PLC SYSTEMS INC
S-3, 1997-08-25
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 25, 1997

                                                      REGISTRATION NO. 333-

                       SECURITIES AND EXCHANGE COMMISSION

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
                                PLC SYSTEMS INC.
             (Exact name of registrant as specified in its charter)

     BRITISH COLUMBIA                                           04-3153858
(State or other jurisdiction of                               (I.R.S. Employer
 incorporation or organization)                              Identification No.)

                            WILLIAM C. DOW, PRESIDENT
                                PLC SYSTEMS INC.
                                  10 FORGE PARK
                          FRANKLIN, MASSACHUSETTS 02038
                                 (508) 541-8800
      (Address, including zip code, and telephone, including area code, of
                    registrant's principal executive offices)

                                    COPY TO:

                            NEIL H. ARONSON, ESQUIRE
               MINTZ, LEVIN, COHN, FERRIS, GLOVSKY AND POPEO, P.C.
                              One Financial Center
                                Boston, MA 02111
                                 (617) 542-6000
                            ------------------------

                         CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
                                                                Proposed           Proposed
                                                                maximum            maximum
Title of each                                                   offering           aggregate           Amount of
class of securities                Amount to be                 price per          offering            registration
to be registered                   registered                   share              price               fee
- ---------------------------------------------------------------------------------------------------------------------
<S>                                <C>                          <C>                <C>                 <C>       
Common Stock, no par               3,165,000                    $12.75(1)          $40,353,750(1)      $12,228.41
value per share
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


(1)      Estimated  solely  for the  purpose  of  calculating  the amount of the
         registration  fee.  Pursuant to Rule 457(c) of the  Securities  Act, as
         amended,  the proposed maximum offering price has been calculated based
         upon the  average  of the high and low  sale  prices  of the  Company's
         Common Stock as reported by the American  Stock  Exchange on August 21,
         1997.






Approximate  date  of  commencement  of  proposed  sale  to  public:  as soon as
practicable after the Registration Statement becomes effective.


         If the only securities  being registered on this Form are being offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. / /

         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933, as amended (the "Securities Act"), other than securities
offered only in connection with dividend or interest  reinvestment  plans, check
the following box. /X/

         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the  Securities  Act  registration  statement  number  of the  earliest
effective registration statement for the same offering. / /

         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering. / /

         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. / /


                                   -----------











PROSPECTUS

                                PLC SYSTEMS INC.
                        3,165,000 SHARES OF COMMON STOCK,
                             NO PAR VALUE PER SHARE

         The  3,165,000  shares of Common  Stock of PLC Systems  Inc., a British
Columbia  corporation  (the  "Company"),  offered  hereby  are being sold by the
selling stockholders identified herein (the "Selling Stockholders"). Such offers
and sales may be made on one or more exchanges, in the over-the-counter  market,
or otherwise,  at prices and on terms then  prevailing,  or at prices related to
the then-current market price, or in negotiated transactions, or by underwriters
pursuant to  underwriting  agreements in customary  form, or in a combination of
any such methods of sale. The Selling  Stockholders may also sell such shares in
accordance  with Rule 144 under the  Securities  Act of 1933,  as  amended  (the
"Securities   Act").  The  Selling   Stockholders  are  identified  and  certain
information  with  respect  to them  is  provided  under  the  caption  "Selling
Stockholders"   herein,  to  which  reference  is  made.  The  expenses  of  the
registration of the securities offered hereby, including fees of counsel for the
Company,  will be paid by the Company.  The following  expenses will be borne by
the Selling  Stockholders:  underwriting  discounts and selling commissions,  if
any, and the fees of legal counsel,  if any, for the Selling  Stockholders.  The
filing by the Company of this Prospectus in accordance with the  requirements of
Form S-3 is not an admission that any person whose shares are included herein is
an "affiliate" of the Company.

         The Selling  Stockholders  have  advised the Company that they have not
engaged any person as an  underwriter  or selling  agent for any of such shares,
but they may in the  future  elect to do so,  and they will be  responsible  for
paying  such a person or  persons  customary  compensation  for so  acting.  The
Selling  Stockholders  and any  broker  executing  sell  orders on behalf of any
Selling Stockholder may be deemed to be "underwriters" within the meaning of the
Securities  Act, in which event  commissions  received by any such broker may be
deemed to be underwriting commissions under the Securities Act. The Company will
not receive any of the proceeds from the sale of the securities  offered hereby.
The Common Stock is listed on the American  Stock  Exchange  ("AMEX")  under the
symbol "PLC". On August 22, 1997, the Closing Sale Price of the Common Stock, as
Reported by AMEX, was $12.875 Per Share.

                             ---------------------

         THE COMMON STOCK OFFERED HEREBY INVOLVES A HIGH DEGREE OF RISK.
                SEE "RISK FACTORS" ON PAGE 4 OF THIS PROSPECTUS.

                             ---------------------

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
      SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
          PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                             ---------------------

         No person is authorized in connection  with any offering made hereby to
give any information or to make any  representations  other than as contained in
this Prospectus, and, if given or made, such information or representations must
not be relied upon as having been authorized by the Company.  This Prospectus is
not an offer to sell, or a solicitation of an offer to buy, by any person in any
jurisdiction  in which it is  unlawful  for such person to make such an offer or
solicitation.  Neither  the  delivery  of this  Prospectus  nor any  sales  made
hereunder  shall  under  any  circumstances  create  any  implication  that  the
information  contained  herein is correct as of any time  subsequent to the date
hereof.



                   THE DATE OF THIS PROSPECTUS IS ____, 1997.








                              AVAILABLE INFORMATION

         The Company is subject to the reporting  requirements of the Securities
Exchange  Act of 1934,  as  amended  (the  "Exchange  Act"),  and in  accordance
therewith files reports and other  information  with the Securities and Exchange
Commission  (the  "Commission").  These  reports,  proxy  statements  and  other
information  can be  inspected  and  copied at the public  reference  facilities
maintained  by the  Commission  at Room 1024 of the  Commission's  office at 450
Fifth Street, N.W., Judiciary Plaza, Washington, D.C. 20549, and at its regional
offices  located at 7 World Trade Center,  Suite 1300,  New York, New York 10048
and Citicorp  Center,  500 West Madison Street,  Suite 1400,  Chicago,  Illinois
60661.  Copies of such reports,  proxy  statements and other  information can be
obtained  from the  Public  Reference  Section  of the  Commission  at 450 Fifth
Street,  N.W.,  Washington,  D.C.  20549 at  prescribed  rates.  The  Commission
maintains a Web site that contains reports, proxy and information statements and
other  information  regarding  registrants  that  file  electronically  with the
Commission.  The  address of the  Commission's  Web site is  http://www.sec.gov.
Additional  updating  information with respect to the securities  covered herein
may be  provided  in the future to  purchasers  by means of  appendices  to this
Prospectus.

         The Company's  Common Stock is listed for trading on AMEX.  Reports and
other information concerning the Company can be inspected at the offices of AMEX
located at 86 Trinity Place, New York, New York 10006-1881.

         The  Company  has filed  with the  Commission  in  Washington,  D.C.  a
registration  statement  (herein,  together  with all  amendments  and exhibits,
referred  to as the  "Registration  Statement")  under the  Securities  Act,  as
amended,  with respect to the securities  offered or to be offered hereby.  This
Prospectus does not contain all of the information  included in the Registration
Statement,  certain items of which are omitted in accordance  with the rules and
regulations of the Commission. For further information about the Company and the
securities offered hereby,  reference is made to the Registration  Statement and
the exhibits  thereto.  Although  statements  contained  herein  concerning  the
provisions of any documents are true and correct in all material  respects,  any
such  statements  are not  necessarily  complete,  and, in each  instance,  such
statements  are qualified in their  entirety by reference to such document filed
as an  exhibit  to the  Registration  Statement  or  otherwise  filed  with  the
Commission.

         The Company  will  provide  without  charge to each person to whom this
Prospectus is delivered,  on the written or oral request of such person,  a copy
of any document incorporated herein by reference,  excluding exhibits.  Requests
should be made to PLC  Systems  Inc.,  10 Forge  Park,  Franklin,  Massachusetts
02038,  or by  telephone  at (508)  541-8800 and directed to Patricia L. Murphy,
Chief Financial Officer.

                                   THE COMPANY

         PLC Systems Inc. (the "Company") has developed a patented  high-powered
carbon  dioxide  ("CO2") laser system known as The Heart  Laser(TM)  (the "Heart
Laser") for broad application in the treatment of coronary artery disease with a
surgical laser procedure developed by the Company and its clinical investigators
known as transmyocardial  revascularization  ("TMR").  The Company believes that
TMR using the Heart  Laser may  provide an  alternative  or  adjunct  therapy to
conventional  revascularization  treatments, such as coronary bypass surgery and
balloon  angioplasty,  which are currently used to bypass or reduce the blockage
in coronary  arteries  afflicted with coronary artery  disease.  Well over 3,000
patients  have been treated with TMR using the Heart Laser in the United  States
and overseas.  The Heart Laser has been shipped to 23 sites in the United States
and as of August  1,  1997,  the  Company  had sold or  placed  62 Heart  Lasers
overseas.  A number  of  studies  and  scientific  conferences  have  been  held
favorably  reporting  on the use of TMR using the Heart  Laser as an  adjunct or
alternative  to  bypass  and  angioplasty  procedures.  On July  28,  1997,  the
Circulatory Advisory Systems Panel of the U.S. Food and Drug Administration,  by
a vote of 9 to 2, voted  non-approval  at this time of the Company's  Pre-Market
Application for the Heart Laser System.



                                      -2-



         The  Company  was  incorporated  pursuant to the Company Act of British
Columbia,  Canada on March 3, 1987. The Company's  principal offices are located
at 10 Forge Park,  Franklin,  Massachusetts  02038,  and its telephone number is
(508) 541-8800.




                                      -3-


                                  RISK FACTORS

         An  investment  in the Common  Stock being  offered by this  Prospectus
involves a high  degree of risk.  The  following  factors,  in addition to those
discussed  elsewhere in the  Prospectus  or  incorporated  herein by  reference,
should be  carefully  considered  in  evaluating  the Company  and its  business
prospects before purchasing  shares offered by this Prospectus.  This Prospectus
contains and  incorporates by reference  forward-looking  statements  within the
"safe harbor"  provisions  of the Private  Securities  Litigation  Reform Act of
1995, which can be identified by the use of forward-looking  terminology such as
"may," "will,"  "would,"  "could,"  "intend,"  "plan,"  "expect,"  "anticipate,"
"estimate," or "continue" or the negative thereof or other variations thereon or
comparable  terminology.  Reference is made in particular to the  discussion set
forth under  "Management's  Discussion  and Analysis of Financial  Condition and
Results  of  Operations"  in the  Company's  Annual  Report on Form 10-K for the
fiscal year ended December 31, 1996 (the "Form 10-K"),  the Quarterly Reports on
Form 10-Q for the  quarters  ended  March 31,  1997 and June 30,  1997 and under
"Business" in the Form 10-K, incorporated in this Prospectus by reference.  Such
statements  are  based  on  current   expectations  that  involve  a  number  of
uncertainties  including  those  set  forth in the risk  factors  below.  Actual
results  could differ  materially  from those  projected in the  forward-looking
statements.

         PRELIMINARY  DENIAL  OF  PRE-MARKET  APPROVAL  BY FDA  ADVISORY  PANEL;
UNCERTAINTIES REGARDING FDA APPROVAL;  GOVERNMENT REGULATIONS.  The Company must
obtain Pre-Market Approval ("PMA") by the FDA before the Company's sole product,
the Heart Laser,  may be marketed in the United  States.  On July 28,  1997,  an
advisory   panel  (the  "FDA  Advisory   Panel")  of  the  U.S.  Food  and  Drug
Administration (the "FDA"), by a vote of 9 to 2, voted against  recommending PMA
for TMR using the Heart Laser at this time,  citing  lack of 12-month  follow-up
data on all patents in the Phase III randomized  study and other  concerns.  The
Company hopes to submit such follow-up data to the FDA by the end of 1997. There
can be no assurance that these clinical  trials will be accepted and approved by
the FDA or the FDA Advisory Panel or, if approved,  will be approved in a timely
manner or for desirable  claims.  The Company's  products and its  manufacturing
activities are subject to extensive and rigorous federal and state regulation in
the United States and to various  regulatory  requirements  in other  countries,
including Japan,  Australia and certain countries in Southeast Asia.  Regulatory
approvals, if granted, may include significant limitations on the indicated uses
for which a product may be marketed.  In addition,  the process of obtaining and
maintaining required approvals can be lengthy, expensive and uncertain.

         Current FDA  enforcement  policy  strictly  prohibits  the marketing of
approved  medical devices for unapproved  uses. In addition,  product  approvals
could be  withdrawn  for  failure to comply  with  regulatory  standards  or the
occurrence of unforeseen  problems following initial  marketing.  The Company is
required for its existing products, and will be required for its Heart Laser, to
adhere to  applicable  regulations  setting  forth  current  Good  Manufacturing
Practices ("GMP") requirements, which include testing, control and documentation
requirements.  Failure  to  comply  with  applicable  GMP  or  other  regulatory
requirements can result in, among other sanctions,  fines, delays or suspensions
of approvals,  injunctions against further distribution,  seizures or recalls of
products,  adverse publicity,  operating restrictions and criminal prosecutions.
Furthermore,  changes in existing  regulations  or  adoption of new  regulations
could  prevent  the  Company  from  obtaining,  or affect the timing of,  future
regulatory  approvals and could adversely affect the continued  marketing of the
Company's existing products.  No assurance can be given that the Company will be
able to obtain necessary  regulatory  approvals on a timely basis or at all, and
delays in receipt of a failure to receive such approvals, the loss of previously
received approvals, or failure to comply with regulatory requirements would have
a material  adverse effect on the Company's  business,  financial  condition and
results of operations.

         UNCERTAINTY   OF  CLINICAL   AND   MARKETING   ACCEPTANCE;   TECHNOLOGY
UNCERTAINTY.  Use of TMR with the Heart Laser without  arresting and cooling the
heart and in lieu of a heart-lung  machine is new and only now  becoming  widely
known.  Market  acceptance  of the Heart  Laser will depend in large part on the
Company's  ability to  demonstrate to the medical  community in general,  and to
cardiac surgeons and cardiologists in particular, the efficacy,  relative safety
and cost effectiveness of treating  cardiovascular disease using the Heart Laser
and to train cardiac  surgeons to perform TMR. To date,  the Company has trained
only a limited  number of  physicians  and will need to expand its marketing and
training  capabilities.  Moreover,  even if TMR using the



                                      -4-


Heart Laser  becomes  generally  accepted by the medical  community,  physicians
trained in competitive TMR products may elect not to consider, or to recommend a
competitor's  products instead of, the Company's Heart Laser. The ability of the
Company to conduct such marketing  programs prior to FDA approval of the PMA for
the Heart Laser may be limited or restricted by FDA  regulations,  guidelines or
policies.  No assurance can be given that TMR will be accepted as an alternative
to other existing or new therapies,  or the  cardiologists  and cardiac surgeons
will accept TMR as an appropriate course of treatment for their patents. Lack of
clinical  and market  acceptance  would have a  material  adverse  effect on the
Company's business, financial condition and results of operations.

         Patients  have  been  treated  with TMR since  only  January  1990.  No
assurance  can  be  given  that  patients  may  not  suffer  adverse,  long-term
consequences from the TMR procedure.

         DEPENDENCE  ON  THE  HEART  LASER  PRODUCT.  The  Company  focuses  its
resources on the  continued  development  and  refinement of its Heart Laser and
single use  surgical  products.  If the  Company  is unable to obtain  requisite
regulatory approvals or to achieve commercial acceptance of the Heart Laser, the
Company's  business,  financial  condition  and results of  operations  would be
materially and adversely affected.

         RAPID TECHNOLOGICAL  CHANGE AND INTENSE  COMPETITION.  The medical care
products  industry is  characterized  by  extensive  research  efforts and rapid
technological  progress.  New  technologies  and  developments  are  expected to
continue  at a rapid pace in both  industry  and  academia.  Competition  in the
market for surgical  lasers and for the treatment of  cardiovascular  disease is
intense  and is  expected to  increase.  The  Company is aware of several  other
companies who have entered the TMR market or have announced  their  intention to
enter the TMR market.  Most of these companies are using holmium lasers, two are
using excimer lasers and a company recently announced its intention to develop a
CO2 laser for TMR.  Most of these  companies are in the early stages of clinical
tests. Management believes that the Heart Laser, if approved for general sale by
the FDA, will compete  primarily  with  conventional  coronary  bypass,  balloon
angioplasty and new coronary procedures  (including  minimally invasive surgical
techniques,  atherectomy, laser angioplasty and metallic stents). Several of the
companies who have entered the TMR market are developing percutaneous methods of
performing  TMR. These  percutaneous  methods of performing TMR are in the early
stages of development and may not be  commercially  available for several years.
However,  if these  methods are  developed,  they could  provide a less invasive
method for use by cardiac surgeons and cardiologists.

         Many of the companies  manufacturing  these devices have  substantially
greater  capital,  as well as  greater  research  and  development,  regulatory,
manufacturing  and  marketing  resources  and  experience  than the  Company and
represent significant competition for the Company. Such companies may succeed in
developing  products that are more effective or less costly in treating coronary
disease than the Heart  Laser,  and may be more  successful  than the Company in
manufacturing  and marketing their products.  No assurance can be given that the
Company's  competitors  or others will not succeed in  developing  technologies,
products or procedures  that are more  effective or less invasive than any being
developed  by the  Company or that would  render the  Company's  technology  and
products  obsolete  or  noncompetitive.   The  advent  of  either  new  devices,
procedures or new  pharmaceutical  agents could hinder the Company's  ability to
compete  effectively  and  have a  material  adverse  effect  on  its  business,
financial condition and results of operations.

         HISTORY OF OPERATING  LOSSES;  NO  ASSURANCE  OF FUTURE  PROFITABILITY.
Prior  to  acquiring  PLC  Medical  System,   Inc.   (formerly  known  as  Laser
Engineering,  Inc.) in 1992, the Company had  essentially  no business,  and had
incurred  operating  losses  since its  inception  in 1987  until the year ended
December 31,  1995.  For the year ended  December 31, 1995,  the Company had net
earnings of $2,004,000.  For the year ended December 31, 1996 and the six months
ended  June 30,  1997,  the  Company  incurred  net  losses  of  $1,540,000  and
$5,719,000,  respectively.  No  assurance  can be given  that the  Company  will
operate profitably on a quarterly or annual basis in the future.

         The Company  believes that periodic  operating  losses are likely until
such time as the  Company  receives  an approval of its PMA from the FDA for the
Heart Laser. The Company  submitted its PMA application in April



                                      -5-


1995. Although the Heart Laser has been granted "expedited review" status by the
FDA, given the current  uncertainties on the time required by the FDA to approve
a PMA application and the recent decision by the FDA Advisory Panel, the Company
cannot  project when, if at all,  such  approval  would be granted.  In February
1997,  the  Company's PMA  application  was filed by the FDA. The filing of this
expedited PMA  application  indicated that the FDA is prepared to prioritize and
commit its resources to this  application  through the remaining review process.
No  assurance  can be given that a PMA approval  will be granted in 1997,  if at
all. On July 28, 1997, the FDA Advisory Panel voted not to recommend approval of
a PMA for TMR using the Heart  Laser.  The  preliminary  denial  will impact the
Company's  Heart  Laser  shipments  and will  likely  delay a number  of  future
shipments.  Until  such  time,  if ever,  as PMA  approval  is  granted,  future
profitability will likely be determined by the number of international shipments
and the related mix of sales and placements.  In addition, the Company must also
convince health care professionals, third party payors and the general public of
the medical and economic  benefits of TMR.  However,  no assurance  can be given
that the Company will be successful in marketing the Heart Laser and TMR or that
the Company  will be able to operate  profitably  on a  consistent  basis,  even
following FDA approval.

         RELIANCE  UPON  PATENTS  AND   PROPRIETARY   RIGHTS;   EXISTING  PATENT
LITIGATION.  Since April 1992,  the Company has  received 11 U.S.  patents.  The
Company  also has issued 13 U.S.  patent  applications  pending  relating to the
Heart Laser  handpiece,  other  technology  associated  with minimally  surgical
techniques and technologies associated with percutaneous TMR. In April 1996, the
Company received patents from the European Patent Office and the Japanese Patent
Office  providing  patent  protection on its heart  synchronization  technology.
Additional  Japanese  issued patents cover laser beam  manipulation  and a laser
beam status indicator.  In December 1996, a patent was issued in Canada covering
a self  aligning  coupler  for a laser  endoscope.  The  Company  has 30 patents
pending  related to the Heart Laser and its components in various  international
patent  offices.  The Company  expects to continue to file  domestic and foreign
patent  applications  on  various  features  of the  Heart  Laser.  However,  no
assurance can be given that any additional patents will be issued.  Furthermore,
no  assurance  can be given  that the  existing  patents  will be held  valid if
subsequently challenged,  that any additional patents will be issued or that the
scope of any patent protection will exclude competition. Similarly, no assurance
can be given  that the other  parties  will not be  issued  patents  which  will
prevent,  limit or interfere with one or more of the Company's products, or will
require  licensing  and the  payment of  significant  fees or  royalties  by the
Company to such third  parties  in order to enable  the  Company to conduct  its
business.  Any of these  occurrences could have a material adverse effect on the
Company's business,  financial condition and results of operations. No assurance
can be given  that any  patents  will  provide  competitive  advantages  for the
Company's products.

         In September 1996, CardioGenesis Corporation  ("CardioGenesis") filed a
civil lawsuit in the United States  District Court seeking to have the Company's
synchronization patent declared invalid, or, alternatively,  asking the court to
determine whether  CardioGenesis  infringes on this patent. In October 1996, the
Company filed an answer and counterclaim  alleging that CardioGenesis  infringes
on  this  patent.  In  January  1997,  CardioGenesis  filed a  challenge  to the
Company's European  synchronization  patent in the European Patent Office and in
March 1997,  the Company filed its  response.  In addition,  in April 1997,  the
Company filed an infringement lawsuit against CardioGenesis in the German courts
alleging infringement of its synchronization patent.

         In February  1996,  the Company  filed suit  against  Eclipse  Surgical
Technologies,  Inc.  ("Eclipse")  in the United  States  District  Court for the
District of Massachusetts alleging copyright infringement of certain copyrighted
FDA protocol works and unfair and deceptive trade practices.

         Legislation  is  pending  in  Congress  that may limit the  ability  of
medical  device  manufacturers  in the future to obtain  patents on surgical and
medical  procedures  that  are not  performed  by,  or as part  of,  devices  or
compositions which are themselves  patentable.  While the Company cannot predict
whether the legislation  will be enacted,  or what  limitations will result from
the law if enacted,  any limitation or reduction in the patentability of medical
or surgical  methods and procedures  could have a material adverse effect on the
Company's ability to protect its proprietary methods and procedures.



                                      -6-


         The  validity  and  breadth of claims  covered  in  medical  technology
patents  involve  complex  legal and  factual  issues and  therefore  are highly
uncertain.  There has been  substantial  litigation  regarding  patent and other
intellectual property rights in the medical device industry.  Litigation,  which
could result in substantial cost to and diversion of effort by the Company,  may
be necessary to enforce patents issued to the Company,  to protect trade secrets
or  know-how  owned by the  Company,  to  defend  the  Company  against  claimed
infringement  of the rights of others and to determine the scope and validity of
the proprietary  rights of others.  Adverse  determinations  in litigation could
subject the Company to significant  liabilities to third parties,  could require
the Company to seek  licenses  from third  parties and could prevent the Company
from  manufacturing,  selling or using its  products,  any of which could have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of operations.

         The Company  also relies upon  unpatented  proprietary  technology  and
trade  secrets  that it  seeks to  protect,  in  part,  through  confidentiality
agreements  with  employees  and other  parties.  No assurance can be given that
these  agreements  will not be  breached,  that the Company  will have  adequate
remedies for any breach, that others will not independently develop or otherwise
acquire  substantially  equivalent  proprietary  technology and trade secrets or
disclose such technology or that the Company can meaningfully protect its rights
in such unpatented  technology.  Any disclosure of such information could have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of  operations.  In addition,  others may hold or receive  patents which
contain claims that may cover products developed by the Company.

         POTENTIAL  LIMITATIONS  ON  THIRD  PARTY  REIMBURSEMENT.   Health  care
providers, such as hospitals and physicians,  that purchase medical devices such
as the Heart  Laser for use on their  patients  generally  rely upon third party
payors, such as Medicare, Medicaid and private insurance plans, to reimburse all
or part of the costs and fees associated with the health care services  provided
to their patients.  Medicare and Medicaid (in some states)  determine whether to
provide  coverage  for  a  particular  procedure  and  reimburse  hospitals  for
inpatient  medical  procedures  at a fixed rate  according to diagnosis  related
groups ("DRGs"). The Health Care Financing  Administration  ("HCFA"), the agency
responsible  for  administering  the Medicare  system,  has prohibited  Medicare
coverage for procedures that are not deemed safe and effective for the condition
being  treated,  or which are still  investigational.  Even if a device  has FDA
approval,  Medicare and other third party payors may deny  reimbursement if they
conclude that the device is not  cost-effective,  or is experimental or used for
an  unimproved  indication.  In November  1995,  the Heart Laser was listed as a
Category B device by the FDA and HCFA. This classification means that treatments
performed   with  the  Heart  Laser  are  eligible  for  Medicare  and  Medicaid
reimbursement   during  the   clinical   trials,   while  the  device  is  still
investigational.  The rule  allowing  coverage  for  Category B devices left the
coverage  determination for procedures involving those devices to the discretion
of  local  Medicare   contractors,   in  the  absence  of  a  national  coverage
instruction.

         In February 1997, HCFA published a national noncoverage instruction for
TMR based upon its belief that scientific evidence substantiating the safety and
effectiveness of TMR is not currently available. HCFA often denies reimbursement
for procedures performed using devices which have not yet received FDA approval.
The noncoverage  instruction applies to procedures performed on or after May 19,
1997 on Medicare  beneficiaries.  No assurance  can be given that  following FDA
approval  of the  Heart  Laser,  HCFA  will  reverse  its  policy  and that such
reimbursement  will be granted or, if granted that the reimbursement  will be at
the same rate or will not be canceled  in the  future.  Even if a device has FDA
clearance,  Medicare  and other  third  party  payors may deny  coverage if they
conclude  that  TMR is  not  reasonable,  necessary  and/or  cost-effective.  No
assurance  can be given that,  even if coverage  is granted,  private  insurance
reimbursement levels will not adversely affect the Company's ability to sell its
products.

         Capital  costs  for  medical   equipment  by  hospitals  are  currently
reimbursed  separately from DRG payments.  Moreover,  even if  reimbursement  is
available,  no assurance can be given that the payors' reimbursement levels will
be adequate to enable the  Company to sell its  product on a  profitable  basis.
Since 1984, Medicare has reimbursed hospitals' operational costs on the basis of
a prospective payment methodology;  however, until recently,  hospitals' capital
costs  have been  excluded  from these  prospective  rates and  reimbursed  on a
capital cost  pass-through  basis.  HCFA has issued final  Medicare  regulations
establishing  the  prospective



                                      -7-


payment  methodology for inpatient  hospital  capital-related  costs.  These new
regulations  include a ten-year  transition  period which blends the old and the
new capital payments. It is anticipated that the new capital costs reimbursement
methodology may reduce Medicare  reimbursement  for hospital  capital costs. Any
reductions  in  Medicare   reimbursement   implemented   pursuant  to  this  new
methodology  could have an adverse  impact on the market for the Heart Laser and
the Company's other surgical lasers. The market for the Company's products could
also be adversely  affected by future  legislation to reform the nation's health
care system or by changes in industry practices regarding  reimbursement  policy
and procedures.

         PENDING LITIGATION.  Following the July 28, 1997 FDA Panel Meeting, the
Company  and certain of its  officers  were named as  defendants  in a number of
alleged class action suits alleging  violations of federal  securities laws. The
plaintiffs  are seeking  damages in  connection  with such  alleged  violations.
Although  the outcome of these suits is not  currently  predictable,  management
believes that the Company has  meritorious  defenses,  and intends to vigorously
defend the suits.  However,  there can be no assurance  that the Company will be
successful  in these  suits and any  decision  adverse  to the  Company  and the
officers  could  have a  material  adverse  effect  on the  Company's  financial
position and results of operations and/or might require the issuance of stock or
other securities of the Company as part of any judgment or settlement.

         DEPENDENCE  UPON KEY  PERSONNEL.  The  highly  technical  nature of the
Company's business,  its ability to continue its technological  developments and
to market its products and thereby develop a competitive edge in the marketplace
depends,  in large  part,  on its  ability to  attract  and  maintain  qualified
technical  and key  management  personnel.  Competition  for such  personnel  is
intense,  and no assurance can be given that the Company will be able to attract
and retain such  personnel.  The Company is  dependent  in  particular  upon the
services of Dr. Robert I. Rudko, its Chairman and Chief Scientist and William C.
Dow, its President and Chief Executive Officer.  The loss of either Dr. Rudko or
Mr. Dow would have a material adverse effect on the Company.

         RISKS  RELATED TO GROWTH AND  EXPANSION.  As a result of both  internal
growth and the  potential  for FDA PMA approval of the Heart Laser,  of which no
assurance can be given, the Company could experience rapid growth and expansion.
This growth and  expansion  could place a  significant  strain on the  Company's
manufacturing and technical support personnel and other resources. The Company's
growth  would  result in an  increase  in the level of  responsibility  for both
existing and new management personnel.  If the Company's management is unable to
manage growth  effectively,  the  Company's  business,  financial  condition and
results of operations would be materially and adversely affected.

         PRODUCT  LIABILITY  AND  POSSIBLE   INSUFFICIENCY  OF  INSURANCE.   The
manufacture  and sale of the  Company's  products  entail  the  risk of  product
liability  claims.  A recent  United States  Supreme  Court  decision held that,
despite  a  company's  compliance  with FDA  regulations,  it  still  may not be
shielded from common-law  negligent design claims or manufacturing  and labeling
claims based on state rules.  No assurance can be given that the coverage limits
of the Company's product liability insurance policies, which are presently at an
annual  aggregate  maximum of $4 million,  will be adequate.  Such  insurance is
expensive and in the future may not be available on acceptable terms, if at all.
A successful  claim or series of claims brought against the Company in excess of
its insurance coverage, and the effect any product liability litigation may have
upon the reputation and marketability of the Company's  technology and products,
together with diversion of the attention of the Company's key  personnel,  could
have a material adverse effect on the Company's  business,  financial  condition
and results of operations.

         POSSIBLE  NEED FOR  ADDITIONAL  FUNDING.  Management  believes that the
Company's  current capital resources and revenues from existing products will be
sufficient to meet its cash requirements for the next 12 months. However, delays
in obtaining regulatory approvals of the Heart Laser or unanticipated  decreases
in  operating  revenues or  increases  in  expenses,  may  adversely  impact the
Company's expected funding requirements,  in which event the Company may require
additional funding. In such an event, the Company would need to obtain financing
through the  issuance  and sale of debt or equity  securities,  bank  financing,
joint  ventures or other means,  and no assurance  can be given that  additional
capital  will be  available  to the  Company or that  capital,  if any,  will be
available upon satisfactory terms.



                                      -8-


         VOLATILE  SECURITIES  MARKET FACTORS AND POSSIBLE WIDE  FLUCTUATIONS IN
STOCK  PRICE.  The  markets for equity  security  in  general,  and for those of
medical device manufacturers in particular,  have been volatile and the price of
the Company's  Common Stock in the future could be subject to wide  fluctuations
in response to  quarterly  variations  in  operating  results,  news and product
announcements,  trading  volume,  general  market trends and other  factors.  No
assurance can be given that the Company's  Common Stock will trade in the future
at market prices in excess of its current market price.

         SHARES  ELIGIBLE  FOR  FUTURE  SALE.  Of the  16,646,266  shares of the
Company's  Common Stock issued and  outstanding on July 23, 1997,  approximately
14,800,000  shares  have been  registered  pursuant to the Act or were sold more
than two years ago and are not held by any  affiliates of the Company and may be
resold  without  limitation  under  the  provisions  of  Rule  144 or any  other
provisions of the Act. Sales of such securities could have a possible depressive
effect upon the prices of the Company's  securities in the public  markets.  The
remaining  approximate  2,246,000  shares  are  restricted  and  subject  to the
provisions of Rule 144 or a certain escrow agreement.

         In  July,  1997,  the  Company  entered  into a  $20,150,000  financing
commitment.  Under the terms of the financing,  the Company received $10,075,000
in July 1997 and will receive an  additional  $10,075,000  in August 1997 on the
filing of the  Registration  Statement for this  Prospectus from the issuance of
convertible debentures to the Selling Stockholders.  The debentures are due five
years from the date of issuance.  The  debentures  are  convertible  into common
shares under a predetermined formula and automatically convert into Common Stock
on the  maturity  date  if not  earlier  converted.  The  first  tranche  of the
debentures are  convertible  into common shares at the lesser of (a) $25.98,  or
(b) the market price of the  Company's  Common Stock at the time of  conversion.
The second tranche of the debentures are  convertible  into common shares at the
lesser of (a) $14.60,  or (b) the market price of the Company's  Common Stock at
the time of conversion.  Other than as described  herein, a maximum of 2,515,000
shares of Common Stock are issuable in full payment of all accrued  interest and
principal for all debentures.

         The Company has further  agreed that should the Company  subsequent  to
August 14, 1997 (1) receive a  recommendation  of non-approval of its Pre-Market
Application  for its Heart Laser System from the  Circulatory  Systems  Advisory
Panel of the U.S. Food and Drug  Administration (the "Panel") or (2) not receive
a  recommendation  of approval from the Panel or FDA approval of its  Pre-Market
Application  for its Heart  Laser  System by August 14,  1998,  then the maximum
number of shares of Common  Stock which the Company  shall be obligated to issue
upon  conversion  of  the  debentures  shall  be  increased  from  2,515,000  to
3,015,000.

         The  convertible  debentures  will  accrue  interest  at 5% per  annum,
payable  in cash  or  common  stock  at the  Company's  option,  at the  time of
conversion.  In connection with the issuance of the first tranche of convertible
debentures,  the Company has issued 69,875 redeemable  warrants to these Selling
Stockholders  to purchase  shares of its Common  Stock at an  exercise  price of
$27.81 per share.  In  connection  with the  issuance  of the second  tranche of
convertible debentures, the Company has issued 80,125 redeemable warrants to the
Selling Stockholders to purchase shares of its Common Stock at an exercise price
of $15.78 per share.  If the average  closing sale price of its Common Stock for
any  consecutive 30 trading day period  commencing  January 17, 1999 exceeds the
exercise  price by more than 50%, the Company has the right,  exercisable at any
time upon 30 days  notice to the holder to redeem the warrant at a price of $.10
per warrant  share.  The warrants  issued in  connection  with the first tranche
expire on July 17,  2002.  The  warrants  issued in  connection  with the second
tranche expire on August 14, 2002.

         SHARES  RESERVED FOR EXERCISE AND GRANTING OF OPTIONS.  The Company has
adopted stock option plans for employees,  officers, and consultants (the "1992,
1993 and 1995  Plans")  pursuant  to which  the  Company  may grant  options  to
purchase  up to an  aggregate  of  3,155,000  shares of Common  Stock and a 1993
Formula Stock Option Plan for  nonemployee  directors (the "Formula Plan") under
which options to purchase  250,000 shares of Common Stock may be granted and the
1997 Executive Stock Option Plan (the "Executive  Plan") under which the Company
may issue  non-qualified  options to purchase up to 650,000  shares to its Chief
Executive Officer.  The Company has granted options to purchase 2,473,694 shares
of Common Stock under the plans. Options to purchase up to an additional 484,532
shares are available under these plans. These options may be exercised,  and the
underlying  shares issued, at a time when the Company would otherwise be able to
obtain



                                      -9-


additional equity capital on terms more favorable to the Company.  Moreover, the
Company may issue additional  equity to third party financing sources in amounts
that are uncertain at this time.

         RESTRICTIONS  ON ELECTIONS OF  DIRECTORS.  The Company is  incorporated
under the laws of British  Columbia.  Under British  Columbia  corporate  law, a
majority of the Company's directors must be residents of Canada and at least one
director must be a resident of British Columbia.  As a result,  security holders
may be limited with respect to the persons that can be nominated  and elected as
directors  of the Company.  In addition,  the  Company's  Articles,  as amended,
provide for a  classified  Board of  Directors.  These  provisions  may have the
effect of delaying or preventing changes in control or management of the Company
and could adversely affect the prevailing market price of the Common Stock.

         POSSIBLE  UNENFORCEABILITY  OF  JUDGMENTS  AGAINST  THE COMPANY AND ITS
CANADIAN  DIRECTORS.  The  Company  is  incorporated  under the laws of  British
Columbia.  Under  British  Columbia  corporate  law,  there  is  doubt as to the
enforceability  in  British  Columbia  against  the  Company  and  the  Canadian
directors of original  actions or actions for enforcement of judgments issued by
courts of the United States.

         NON-PAYMENT OF DIVIDENDS.  The Company has never paid cash dividends on
its Common Stock. The Company  currently  intends to retain all future earnings,
if any, for use in its business and does not anticipate that cash dividends will
be paid in the foreseeable future.

                                 USE OF PROCEEDS

         The Company will not receive any of the  proceeds  from the sale of the
Common Stock by the Selling Stockholders.

                              SELLING STOCKHOLDERS

         The shares of Common Stock offered  hereby by the Selling  Stockholders
are issuable upon (a) the conversion of convertible  debentures in the aggregate
amount of $20,150,000 (the  "Convertible  Debentures")  issued by the Company in
private  placements in July and August 1997 (the "1997 Private  Placements")  to
Southbrook International Investments Ltd. ("Southbrook"), HBK Cayman, L.P. ("HBK
Cayman"),  HBK Offshore Fund Ltd. ("HBK  Offshore"),  and Brown Simpson  Capital
Growth Fund LLP ("Brown Simpson"),  and (b) the exercise of warrants to purchase
an aggregate of 150,000  shares of Common Stock (the  "Warrants")  issued by the
Company to Southbrook,  HBK Cayman, HBK Offshore and Brown Simpson in connection
with the 1997 Private Placements.

         The number of shares registered on the registration  statement of which
this  Prospectus  is a part and the number of shares  offered  hereby  have been
determined  by  agreement  between the  Company,  Southbrook,  HBK  Cayman,  HBK
Offshore and BSSGF. The number of shares of Common Stock that will ultimately be
issued to Southbrook,  HBK Cayman, HBK Offshore and BSSGF upon conversion of the
Convertible  Debentures is dependent  upon a conversion  formula which relies in
part on the lowest  closing bid price of the Common  Stock for five  consecutive
trading days during the 30 days  immediately  preceding  the date of  conversion
and,  therefore  cannot be  determined  at this time.  In no event are more than
3,015,000 issuable upon conversion and payment for all debentures.

         The  following  table  sets  forth  information  with  respect  to  the
beneficial  ownership of the Company's Common Stock by the Selling  Stockholders
as of August 20,  1997,  and as adjusted to reflect the sale of the Common Stock
offered hereby by the Selling Stockholders assuming the maximum number of shares
are issued under the debentures:


                                      -10-


<TABLE>
<CAPTION>
                                Maximum Number 
                                 of Shares              Shares           
                               Owned Prior to        Registered for      
Selling Stockholder              Offering(1)          Sale Hereby        
- -------------------           --------------            -------          
                                                                         
                                                                         
<S>                               <C>                   <C>              
Southbrook International
 Investments, Ltd.                1,568,542(2)          1,568,542        

HBK Cayman, L.P.                    784,271(3)            784,271        

HBK Offshore Fund Ltd.              784,271(4)            784,271        

Brown Simpson Capital
 Growth Fund, LLP                    27,916(5)             27,916        

- ----------------------
</TABLE>

*        Less than 1%


(1)      Includes  shares  issuable  upon  payment of accrued  interest  on such
         debentures.  The shares  referenced  above  also  include up to 500,000
         additional  shares which may be issuable pro rata to the holders of the
         debentures  upon  conversion  of such  debentures  should  the  Company
         subsequent to  August  14,  1997  (1)  receive  a   recommendation   of
         non-approval  of its Pre-Market Application  for its Heart Laser System
         from the Circulatory  Systems  Advisory Panel of the U.S. Food and Drug
         Administration  (the  "Panel") or (2) not receive a  recommendation  of
         approval from the panel or FDA approval of its  Pre-Market  Application
         for its Heart Laser by August 14, 1998.

(2)      Includes up to a maximum of 1,496,278  shares of Common Stock  issuable
         upon  conversion  of  $10,000,000  of  Convertible  Debentures  and the
         exercise of the Warrants  owned by  Southbrook to purchase up to 72,264
         shares  of Common  Stock.  The  Convertible  Preferred  Stock  Purchase
         Agreement  limits the  conversion  rights of  Southbrook  such that the
         maximum  number of shares of the  Company's  Common  Stock  issued upon
         conversion or exercise of the  Convertible  Debentures and Warrants may
         not  exceed  4.99% of the then  issued  and  outstanding  shares of the
         Company's Common Stock following such conversion.

(3)      Includes  up to a maximum of 748,139  shares of Common  Stock  issuable
         upon  conversion  of  $5,000,000  of  Convertible  Debentures  and  the
         exercise of the  Warrants  owned by HBK Cayman,  L.P. to purchase up to
         36,132 shares of Common Stock.

(4)      Includes  up to a maximum of 748,139  shares of Common  Stock  issuable
         upon  conversion  of  $5,000,000  of  Convertible  Debentures  and  the
         exercise of the Warrants owned by HBK Offshare  Fund,  Ltd. to purchase
         up to 36,132 shares of Common Stock.

(5)      Includes up to a maximum of 22,444 shares of Common Stock issuable upon
         conversion of $150,000 of  Convertible  Debentures  and the exercise of
         the  Warrants  owned by Brown  Simpson  Capital  Growth  fund,  L.P. to
         purchase up to 5,472 shares of Common Stock.


                              PLAN OF DISTRIBUTION

         The 3,165,000  shares of Common Stock of the Company offered hereby may
be  offered  and  sold  from  time to time by the  Selling  Stockholders,  or by
pledgees,  donees,  transferees or other successors in interest. Such offers and
sales  may be  made  from  time  to  time  on one or  more  exchanges  or in the
over-the-counter market, or otherwise, at prices and on terms then prevailing or
at  prices  related  to  the   then-current   market  price,  or  in  negotiated
transactions.  The methods by which the shares may be sold may include,  but not
be limited to, the following: (a) a block trade in which the broker or dealer so
engaged  will  attempt to sell the shares as agent but may position and resell a
portion of the block as principal to facilitate the  transaction;  (b) purchases
by a broker or dealer as  principal  and resale by such broker or dealer for its
account;  (c) an  exchange  distribution  in  accordance  with the rules of such
exchange;  (d) ordinary  brokerage  transactions  and  transactions in which the
broker solicits



                                      -11-


purchasers;  (e) privately negotiated  transactions;  (f) short sales; and (g) a
combination of any such methods of sale. In effecting sales,  brokers or dealers
engaged by the Selling  Stockholder  may arrange for other brokers or dealers to
participate.  Brokers or dealers may receive  commissions  or discounts from the
Selling  Stockholders  or  from  the  purchasers  in  amounts  to be  negotiated
immediately  prior to the  sale.  The  Selling  Stockholders  may also sell such
shares in accordance with Rule 144 under the Securities Act.

         From time to time the Selling  Stockholders  may engage in short sales,
short sales against the box, puts and calls and other transactions in securities
of the Company in  derivatives  thereof,  and may sell and deliver the shares in
connection  therewith.  From time to time Selling  Stockholders may pledge their
shares pursuant to the margin provisions of their respective customer agreements
with their  respective  brokers.  Upon a default by a Selling  Stockholder,  the
broker may offer and sell the pledge shares of Common Stock from time to time.

         The  Company  has  agreed  to use its  best  efforts  to  maintain  the
effectiveness  of the  registration of the shares being offered  hereunder until
August 2002 or such earlier date when all of the shares being offered  hereunder
have been sold or may be sold without volume or other  restrictions  pursuant to
Rule 144 or Rule 144A under the Securities  Act, as determined by counsel to the
Company pursuant to a written opinion letter.

         The Selling  Stockholders  and any brokers  participating in such sales
may be deemed to be underwriters within the meaning of the Securities Act. There
can be no assurance  that the Selling  Stockholders  will sell any or all of the
shares of Common Stock offered hereunder.

         All  proceeds  from any such sales will be the  property of the Selling
Stockholder  who will bear the  expense of  underwriting  discounts  and selling
commissions, if any, and their own legal fees.

                            LEGALITY OF COMMON STOCK

         The  validity  of the shares of Common  Stock  offered  hereby is being
passed upon for the Company by Mintz,  Levin, Cohn,  Ferris,  Glovsky and Popeo,
P.C., Boston, Massachusetts.

                                     EXPERTS

         The consolidated  financial  statements of PLC Systems Inc. at December
31, 1996 and 1995, and for the two years ended  December 31, 1996,  incorporated
by reference in PLC Systems  Inc.'s Annual Report (Form 10-K) for the year ended
December 31, 1996, have been audited by Ernst & Young LLP, independent auditors,
as set forth in their report thereon included therein and incorporated herein by
reference.  Such financial statements have been incorporated herein by reference
in reliance  upon such reports  given upon the authority of such firm as experts
in accounting and auditing.

         The consolidated  statement of operations and cash flows of PLC Systems
Inc. for the year ended  December 31,  1994,  incorporated  by reference in this
Prospectus and elsewhere in the Registration  Statement,  have been incorporated
by reference  herein in reliance on the reports of Coopers & Lybrand,  chartered
accountants,  given the  authority  of that firm as  experts in  accounting  and
auditing.


                     INTERESTS OF NAMED EXPERTS AND COUNSEL

         A member of Mintz,  Levin, Cohn, Ferris,  Glovsky and Popeo, P.C., owns
3,162 shares of Common Stock of the Company.

                INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

         The following  documents  filed with the  Commission  are  incorporated
herein by reference:

         (a)      The  Company's  Annual Report on Form 10-K for the fiscal year
                  ended December 31, 1996 (File No. 1-11388).

         (b)      The Company's  Quarterly Reports on Form 10-Q for the quarters
                  ended June 30, 1997 and March 31, 1997.



                                      -12-



         (c)      The  description of the Company's  capital stock  contained in
                  the  Company's  registration  statement  on Form 8-A under the
                  1934 Act (File No. 1-11388),  including  amendments or reports
                  filed for the purpose of updating such description.

         All reports and other documents  subsequently filed by the Company with
the Commission  pursuant to Sections 13(a), 13(c), 14 and 15(d) of the 1934 Act,
prior to the  filing of a  post-effective  amendment  which  indicates  that all
securities  covered by this Prospectus  have been sold or which  deregisters all
such  securities  then remaining  unsold,  shall be deemed to be incorporated by
reference  herein  and to be a part  hereof  from the date of the filing of such
reports and documents.

         Any statement contained herein or in a document  incorporated or deemed
to be  incorporated  by  reference  herein  shall be  deemed to be  modified  or
superseded for purposes of the Registration Statement and this Prospectus to the
extent that a statement  contained herein or in any subsequently  filed document
which also is or is deemed to be  incorporated  by reference  herein modifies or
supersedes  such statement.  Any such statement so modified or superseded  shall
not be deemed, except as so modified or superseded,  to constitute a part of the
Registration Statement or this Prospectus.

         The Company will provide,  without charge,  to each person to whom this
Prospectus  is delivered,  on the written or oral request of any such person,  a
copy of any or all documents which have been  incorporated  herein by reference,
other than exhibits to such  documents  (unless such  exhibits are  specifically
incorporated by reference into such  documents).  Requests should be directed to
Patricia L. Murphy, Chief Financial Officer, at PLC Systems Inc., 10 Forge Park,
Franklin, Massachusetts 02038, or by telephone at (508) 541-8800.

                                 INDEMNIFICATION

         The British  Columbia  Company Act (the  "Company  Act"),  Section 152,
enables a corporation,  with the approval of the Court,  to indemnify a director
or a former  director of the  Company,  or a director or a former  director of a
corporation  of which it is or was a  shareholder,  and his heirs  and  personal
representatives,  against all costs,  charges and expenses,  including an amount
paid to settle an action or to  satisfy  a  judgment,  actually  and  reasonably
incurred  by him,  including  an amount  paid to  settle an action or  satisfy a
judgment in a civil,  criminal or administrative  action, or proceeding to which
he is made a party by reason of being or having  been a director,  including  an
action brought by the Company or corporation if:

         a.       he acted  honestly  and in good  faith with a view to the best
                  interest of the  corporation of which he is or was a director;
                  and

         b.       in  the  case  of  a  criminal  or  administrative  action  or
                  proceeding,  he had reasonable  grounds for believing that his
                  conduct was lawful.

         The Company Act also  provides that a company may purchase and maintain
insurance  for a director or former  director of the  Company,  or a director or
former  director of a corporation of which it is or was a  shareholder,  and his
heirs and  personal  representatives,  against  liability  incurred  by him as a
director or officer.

         The Articles of the Company  provide that the Company  shall  indemnify
any  person  who was or is a party  or is  threatened  to be made a party to any
threatened,  pending or completed action or proceeding whether or not brought by
the Company or by a  corporation  or other legal  entity or  enterprise  whether
civil,  criminal  or  administrative,  by reason of the fact that he is or was a
director, officer, employee or agent of the Company, or is or was serving at the
request of the  Company as a  director,  officer,  employee  or agent of another
corporation, partnership, joint venture, trust or other enterprise in accordance
with Section 152 of the Company Act.

         The  Articles  of the  Company  also  provide  that the  Company  shall
indemnify  any person other than a director  with  respect to any loss,  damage,
costs or  expenses  whatsoever  incurred  by him  while  acting  as an  officer,
employee or agent for the  Company  unless  such loss,  damage,  cost or expense
shall arise out of failure to



                                      -13-


comply with instructions, willful act, or default or fraud by such person in any
of which events the Company shall only  indemnify  such persons if the directors
in their absolute  discretion so decide, or the Company by ordinary  resolutions
shall so direct.

         The  indemnification  provided by the Company's Articles shall continue
as to a person who has ceased to be a director,  officer, employee or agent, and
shall benefit such person's heirs, executors and administrators.

         The Articles of the Company  authorize the directors  from time to time
to cause the Company to give  indemnities  to any director,  officer,  employee,
agent or other person who has  undertaken or is about to undertake any liability
on behalf of the Company or any corporation controlled by it.

         The  Articles  of the  Company  further  provide  that,  subject to the
Company Act no  director,  officer or employee for the time being of the Company
shall be liable  for the  acts,  receipts,  neglects  or  defaults  of any other
director,  officer,  or  employee  or for  joining  in any  receipt  or act  for
conformity, or for any loss, damages or expense happening to the Company through
insufficiency  or deficiency  of title to any property  acquired by order of the
board for the Company, or for the insufficiency or deficiency of any security in
or upon which any monies of or belonging to the Company shall be invested or for
any loss or damages arising from the  bankruptcy,  insolvency or tortious act of
any person,  firm or  corporation  with whom or which any monies,  securities or
effects shall be lodged or deposited or for any loss  occasioned by any error of
judgment  or  oversight  on his  part,  or for any loss,  damage  or  misfortune
whatever  which may  happen in the  execution  of the  duties of his  respective
office  or trust or in  relation  thereto  unless  the same  shall  happen by or
through his own willful act of default, negligence, breach of trust or breach of
duty.

         The Articles of the Company  provide that the  directors of the Company
may rely upon the accuracy of any statement of fact represented by an officer of
the Company to be correct, or upon statements in a written report of the auditor
of the  Company,  and shall not be  reasonable  or held  liable  for any loss or
damage  resulting in the paying of any  dividends  or  otherwise  acting in good
faith upon any such statement.

         The Articles of the Company  permit the  directors to cause the Company
to purchase and maintain insurance for the benefit of any person who was or is a
director,  officer, employee or agent of the Company or is or was serving at the
request of the  Company as a  director,  officer,  employee  or agent of another
corporation,  partnership,  joint venture, trust or other enterprise against any
liability incurred by him as a director, officer, employee or agent.

COMMISSION POLICY

         Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors,  officers or persons controlling the Company,
the  Company  has been  informed  that in the  opinion  of the  Commission  such
indemnification  is against public policy as expressed in the Securities Act and
is therefore unenforceable.



                                      -14-






================================================================================

No dealer,  salesman or any other person has been  authorized in connection with
this Offering to give any information or to make any representations  other than
those contained in this  Prospectus  and, if given or made, such  information or
representations  must  not be  relied  upon as  having  been  authorized  by the
Company.  This Prospectus does not constitute an offer to sell or a solicitation
of an offer to buy any of the securities  offered hereby in any  jurisdiction in
which such offer or solicitation is not authorized or in which the person making
such offer or solicitation is not qualified to do so or to any person to whom it
is unlawful to make such an offer or solicitation.  Neither the delivery of this
Prospectus nor any sale made hereunder shall, under any circumstances, create an
implication that there has been no change in the circumstances of the Company or
the facts herein set forth since the date hereof.


                               ------------------

                                TABLE OF CONTENTS
                                                                         PAGE
                                                                         ----

Available Information........................................              2
The Company..................................................              2
Risk Factors.................................................              4    
Use of Proceeds..............................................             10
Selling Stockholders.........................................             10
Plan of Distribution.........................................             11
Legality of Common Stock.....................................             12
Experts......................................................             12 
Interests of Named Experts and Counsel.......................             12
Incorporation of Certain Information
  by Reference...............................................             12
Indemnification..............................................             13


================================================================================



================================================================================

                        3,165,000 SHARES OF COMMON STOCK,
                             NO PAR VALUE PER SHARE
                                    
                                    
                                PLC SYSTEMS INC.
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                               ------------------              
                                    
                                   PROSPECTUS
                                    
                               ------------------          
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                 AUGUST __, 1997
                                    


================================================================================


                                                                                



                 PART II. INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The  following  expenses  incurred in  connection  with the sale of the
securities being registered will be borne by the Registrant.  Other than the SEC
registration fee and AMEX filing fee, the amounts stated are estimates.

         SEC Registration Fee................................ $12,228.41

         AMEX Filing Fee.....................................  17,500.00

         Legal Fees and Expenses.............................  10,000.00

         Accounting Fees and Expenses........................   5,000.00

         Miscellaneous.......................................     271.59

TOTAL........................................................ $45,000.00


         The  Selling  Stockholders  will  bear the  expense  of their own legal
counsel and miscellaneous fees and expenses, if any.

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         See "Indemnification" contained in Part I hereof, which is incorporated
herein by reference.

         The corporation  shall indemnify and hold harmless persons who serve at
its express written request as directors or officers of another  organization in
which the corporation owns shares or of which it is a creditor.

         In addition,  the Registration Rights Agreement,  filed as Exhibit 99.2
hereto,  contains provisions for indemnification by the Selling  Stockholders of
the Registrant and its officers,  directors,  and  controlling  persons  against
certain liabilities under the Securities Act.

ITEM 16.  EXHIBITS.

EXHIBIT
NUMBER   DESCRIPTION
- ------

   4.1   The Certificate of Incorporation of the Registrant (previously filed as
         Exhibit 3a to the Registrant's Registration Statement on Form S-1, File
         No. 33-48340, and incorporated herein by reference).

   4.2   Form of Common Stock Certificate (previously filed as Exhibit No. 4c to
         the Registrant's Registration Statement on Form S-1, File No. 33-48340,
         and incorporated herein by reference).

   5     Opinion of Mintz,  Levin, Cohn,  Ferris,  Glovsky and Popeo, P.C., with
         respect to the legality of the securities being registered.

  23.1   Consent of Coopers and Lybrand

  23.2   Consent of Ernst & Young LLP

  23.3   Consent  of  Mintz,  Levin,  Cohn,  Ferris,  Glovsky  and  Popeo,  P.C.
         (included in Exhibit 5)

   24    Power of Attorney (filed in Part II of this Registration Statement)


 *99.1   Convertible  Debenture  Purchase  Agreement  dated as of July 17,  1997
         between Southbrook International Investment, Ltd., HBK Cayman, L.P. and
         HBK Offshore Fund Ltd. and the Registrant.

 *99.2   First Amendment to Convertible  Debenture Purchase Agreement dated July
         22, 1997.

 *99.3   Second  Amendment to Convertible  Debenture  Purchase  Agreement  dated
         August 14, 1997.
         
 *99.4   Form of Convertible Debenture.

 *99.5   Form of Warrant.

 *99.6   Registration  Rights  Agreement  dated  as of  July  17,  1997  between
         Southbrook  International  Investment,  Ltd., HBK Cayman,  L.P. and HBK
         Offshore Fund Ltd. and the Registrant.

_______________________

 *   Each of Exhibits  99.1 through 99.6 were  previously  filed as Exhibits 10a
     through 10f,  respectively,  to the  Registrant's  Quarterly Report on Form
     10-Q for the  period  ended  June 30,  1997  (File  No.  1-11388),  and are
     incorporated herein by reference.


                                      II-1


ITEM 17.  UNDERTAKINGS.

A.       Rule 415 Offering

         The undersigned Registrant hereby undertakes:

         (1) To file, during any period in which offers or sales are being made,
a post-effective amendment to this registration statement:

         (i) To include  any  prospectus  required  by Section  10(a)(3)  of the
Securities Act;

         (ii) To reflect in the prospectus any facts or events arising after the
effective date of the registration  statement (or the most recent post-effective
amendment  thereof)  which,  individually  or  in  the  aggregate,  represent  a
fundamental  change in the information set forth in the registration  statement.
Notwithstanding the foregoing,  any increase or decrease in volume of securities
offered (if the total dollar value of  securities  offered would not exceed that
which  was  registered)  and any  deviation  from  the  low or  high  end of the
estimated  maximum  offering  range may be reflected  in the form of  prospectus
filed  with  the  Commission  pursuant  to  Rule  424(b)(sec.230.424(b)  of this
chapter) if, in the aggregate, the changes in volume and price represent no more
than a 20%  change  in the  maximum  aggregate  offering  price set forth in the
"Calculation of Registration Fee" table in the effective registration statement.

         (iii) To include any material  information  with respect to the plan of
distribution  not  previously  disclosed  in the  registration  statement or any
material change to such information in the registration statement;

         PROVIDED, HOWEVER, that paragraphs

         (A)(i) and  (1)(ii) do not apply if the  registration  statement  is on
Form  S-3 or  Form  S-8,  and  the  information  required  to be  included  in a
post-effective  amendment by those  paragraphs is contained in periodic  reports
filed by the Registrant  pursuant to Section 13 or Section 15(d) of the 1934 Act
that are incorporated by reference in the registration statement.

         (2) That,  for the  purpose  of  determining  any  liability  under the
Securities Act, each such  post-effective  amendment shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

         (3) To remove from registration by means of a post-effective  amendment
any of the securities being registered which remain unsold at the termination of
the offering.

B.       Filings Incorporating Subsequent Exchange Act Documents by Reference

         The  undersigned  Registrant  hereby  undertakes  that, for purposes of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
registrant's  annual  report  pursuant to section  13(a) or section 15(d) of the
1934 Act (and,  where  applicable,  each  filing of an employee  benefit  plan's
annual report pursuant to section 15(d) of the 1934 Act) that is incorporated by
reference in the registration statement shall be deemed to be a new registration
statement relating to the securities  offered therein,  and the offering of such
securities  at that time shall be deemed to be the  initial  bona fide  offering
thereof.

C.       Request  for  Acceleration  of Effective Date or Filing of Registration
Statement on Form S-8

         Insofar as indemnification for liabilities arising under the Securities
Act may be  permitted to  directors,  officers  and  controlling  persons of the
Registrant pursuant to the foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the Commission such  indemnification  is
against  public  policy as expressed in the  Securities  Act and is,  therefore,
unenforceable.  In the  event  that a claim  for  indemnification  against  such
liabilities  (other than the payment by the  Registrant of expenses  incurred or
paid by a  director,



                                      II-2


officer or controlling person of the registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or controlling
person in connection with the securities being registered,  the Registrant will,
unless in the opinion of its counsel the matter has been settled by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification  by it is  against  public  policy  as  expressed  in  the
Securities Act and will be governed by the final adjudication of such issue.




                                      II-3



                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City of Franklin,  Commonwealth of Massachusetts,  on August
__, 1997.

                                PLC SYSTEMS INC.



                                By: /s/ William C. Dow
                                   -------------------------------------
                                   William C. Dow
                                   President and Chief Executive Officer

                                POWER OF ATTORNEY
                                -----------------

         KNOW  ALL MEN BY THESE  PRESENTS,  that  each  person  whose  signature
appears below constitutes and appoints William C. Dow and Patricia L. Murphy, or
any of them, his attorney-in-fact,  each with the power of substitution, for him
in  any  and  all  capacities,   to  sign  any  and  all  amendments  (including
post-effective  amendments)  to  this  registration  statement,  (or  any  other
registration statement for the same offering that is to be effective upon filing
pursuant to Rule 462(b) under the Securities Act) and to file the same, with all
exhibits  thereto  and  other  documents  in  connection  therewith,   with  the
Securities and Exchange Commission,  hereby granting unto said attorneys-in-fact
and agents,  and each of them,  full power and  authority to do and perform each
and every  act and  thing  requisite  or  necessary  to be done in and about the
premises, as full to all intents and purposes as he might or could do in person,
hereby  ratifying and confirming all that said  attorneys-in-fact  and agents or
any of them or their or his  substitutes  may lawfully do or cause to be done by
virtue hereof.

         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.

<TABLE>
<CAPTION>
         SIGNATURE                          TITLE                                            DATE
         <S>                                <C>                                         <C>
         /s/ William C. Dow                 President and Chief Executive               August 25, 1997
         ---------------------------
         William C. Dow                     Officer and Director (principal
                                            executive officer)
         /s/ Patricia L. Murphy
         ---------------------------        Chief Financial Officer,                    August 25, 1997
         Patricia L. Murphy                 Treasurer (principal financial
                                            officer and principal
                                            accounting officer)

         /s/ Robert I. Rudko                Chairman of the Board of                    August 25, 1997
         ---------------------------
         Robert I. Rudko, Ph.D               Directors

         /s/ Harold P. Capozzi
         ---------------------------         Director                                   August 25, 1997
         Harold P. Capozzi

  
         ---------------------------         Director                                   August __, 1997
         H.B. Brent Norton

         /s/ Edward Pendergast
         ---------------------------         Director                                   August 25, 1997
         Edward Pendergast

         /s/ Kenneth J. Pulkonik
         ---------------------------         Director                                   August 25, 1997
         Kenneth J. Pulkonik

         /s/ Robert A. Smith
         ---------------------------         Director                                   August 25, 1997
         Robert A. Smith


</TABLE>

                                      II-5





                                PLC SYSTEMS INC.

                          INDEX TO EXHIBITS FILED WITH
                         FORM S-3 REGISTRATION STATEMENT

EXHIBIT
NUMBER   DESCRIPTION
- ------   -----------------------------------------------------------------------

   4.1   The Certificate of Incorporation of the Registrant (previously filed as
         Exhibit 3a to the Registrant's Registration Statement on Form S-1, File
         No. 33-48340, and incorporated herein by reference).

   4.2   Form of Common Stock Certificate (previously filed as Exhibit No. 4c to
         the Registrant's Registration Statement on Form S-1, File No. 33-48340,
         and incorporated herein by reference).

   5     Opinion of Mintz,  Levin, Cohn,  Ferris,  Glovsky and Popeo, P.C., with
         respect to the legality of the securities being registered.

  23.1   Consent of Coopers & Lybrand

  23.2   Consent of Ernst & Young LLP 

  23.3   Consent  of  Mintz,  Levin,  Cohn,  Ferris,  Glovsky  and  Popeo,  P.C.
         (included in Exhibit 5).

  24     Power of Attorney (filed in Part II of this Registration Statement) .

 *99.1   Convertible  Debenture  Purchase  Agreement  dated as of July 17,  1997
         between Southbrook International Investment,  Ltd, HBK Cayman, L.P. and
         HBK Offshore Fund Ltd. and the Registrant.

 *99.2   First Amendment to Convertible  Debenture Purchase Agreement dated July
         22, 1997.

 *99.3   Second  Amendment to Convertible  Debenture  Purchase  Agreement  dated
         August 14, 1997.

 *99.4   Form of Convertible Debenture.

 *99.5   Form of Warrant.

 *99.6   Registration  Rights  Agreement  dated  as of  July  17,  1997  between
         Southbrook  International  Investment,  Ltd., HBK Cayman,  L.P. and HBK
         Offshore Fund Ltd. and the Registrant.

- --------------------

*        Each of Exhibits  99.1 through 99.6 were  previously  filed as Exhibits
         10a through 10f, respectively,  to the Registrant's Quarterly Report on
         Form 10-Q for the period  ended June 30, 1997 (File No.  1-11388),  and
         are incorporated herein by reference.




                                                                       EXHIBIT 5
                                                                       ---------


              MINTZ, LEVIN, COHN, FERRIS, GLOVSKY AND POPEO, P.C.
                              ONE FINANCIAL CENTER
                             BOSTON, MASSACHUSETTS

701 Pennsylvania Avenue, N.W.                            Telephone: 617/542-6000
Washington, D.C. 20004                                             Fax: 617/2241
Telephone: 202/434-7300
Fax: 202/434-7400


                                             August 25, 1997


PLC Systems Inc.
10 Forge Park
Franklin, Massachusetts 02038

Ladies and Gentlemen:

         We have  acted as  counsel  to PLC  Systems  Inc.,  a British  Columbia
corporation (the "Company"),  in connection with the preparation and filing with
the Securities and Exchange  Commission of a Registration  Statement on Form S-3
(the  "Registration  Statement"),  pursuant to which the Company is  registering
under the Securities Act of 1933, as amended,  a total of 3,165,000  shares (the
"Shares") of its common stock, no par value per share (the "Common Stock"),  for
resale to the  public.  The  Shares are to be sold by the  selling  stockholders
identified  in the  Registration  Statement.  This opinion is being  rendered in
connection with the filing of the Registration Statement.

         In  connection  with  this  opinion,  we have  examined  the  Company's
Certificate of Incorporatin and By-Laws, both as currently in effect; such other
records of the  corporate  proceedings  of the Company and  certificates  of the
Company's  officers as we have deemed relevant;  and the Registration  Statement
and the exhibits thereto.

         In our examination,  we have assumed the genuineness of all signatures,
the legal  capacity  of  natural  persons,  the  authenticity  of all  documents
submitted  to us as  originals,  the  conformity  to original  documents  of all
documents   submitted  to  us  as  certified  or  photostatic   copies  and  the
authenticity of the originals of such copies.

         Based upon the  foregoing,  we are of the  opinion  that (i) the Shares
have been duly and validly  authorized by the Company and (ii) the Shares,  when
sold,  will have been duly and  validly  issued,  fully paid and  non-assessable
shares of the Common Stock, free of preemptive rights.






MINTZ, LEVIN, COHN, FERRIS, GLOVSKY AND POPEO, P.C.

PLC Systems Inc.
August 25, 1997
Page 2

     Our  opinion  is  limited  to the  federal  securities  laws of the United
States,  the laws of the Commonwealth of Massachusetts and the corporate laws of
the Province of British Columbia, Canada, and we express no opinion with respect
to the laws of any other  jurisdiction.  No opinion  is  expressed  herein  with
respect to the qualification of the Shares under the securities or blue sky laws
of any state or any foreign jurisdiction.

     We  understand  that you wish to file this  opinion  as an  exhibit  to the
Registration Statement, and we hereby consent thereto. We hereby further consent
to the  reference  to us under the  caption  "Legality  of Common  Stock" in the
prospectus included in the Registration Statement.


                                                     Very truly your,


                                                     MINTZ, LEVIN, COHN, FERRIS,
                                                         GLOVSKY and POPEO, P.C.


cc: Board of Directors





                                                                    EXHIBIT 23.1
                                                                    ------------


                       CONSENT OF INDEPENDENT ACCOUNTANTS


         We consent  to the  incorporation  by  reference  in this  Registration
Statement  of PLC Systems  Inc. on Form S-3 of our report dated March 1, 1995 on
our audit of the  consolidated  financial  statements  and  financial  statement
schedule of  PLC Systems  Inc. as of December  31,  1994,  and for the year then
ended. We also consent to the reference to our firm under the caption "Experts."


                                             COOPERS & LYBRAND



August 25, 1997
Vancouver, B.C.









                                                                    EXHIBIT 23.2
                                                                    ------------



                       CONSENT OF INDEPENDENT AUDITORS



         We consent to the reference to our firm under the caption  "Experts" in
the Registration Statement (Form S-3) and related Prospectus of PLC Systems Inc.
for  the  registration  of  3,165,000  shares  of its  common  stock  and to the
incorporation  by reference  therein of our reports dated February 21, 1997 with
respect  to  the   consolidated   financial   statements  of  PLC  Systems  Inc.
incorporated  by reference  in its Annual  Report (Form 10-K) for the year ended
December 31, 1996 and the related financial statement schedule included therein,
filed with the Securities and Exchange Commission.



                                                  ERNST & YOUNG LLP





Boston, Massacusetts
August 25, 1997






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