Document:

EXHIBIT 4.1

                        Form of Common Share Certificate

                       [Face of Common Share Certificate]

                            WORLDHEART
           COMMON SHARES                 COMMON SHARES
NUMBER                                                               SHARES
------                                                               ------
           THIS CERTIFICATE IS
           TRANSFERABLE IN THE
           CITY OF TORONTO,
           ONTARIO OR NEW YORK,
           NEW YORK

           INCORPORATED UNDER            SEE REVERSE FOR CERTAIN
           THE LAW OF THE                DEFINITIONS
           PROVINCE OF ONTARIO

                                         CUSIP 980905 20 2

                             WORLD HEART CORPORATION

THIS CERTIFIES THAT

is the owner of
FULLY PAID AND NON-ASSESSABLE COMMON SHARES, WITHOUT NOMINAL OR PAR VALUE, OF

                             WORLD HEART CORPORATION

transferable on the books of the Corporation by the holder hereof in person or
by duly authorized attorney, upon surrender of this Certificate duly endorsed.
Holders may surrender this Certificate to the Transfer Agent and Registrar in
Toronto or the Co-Transfer Agent and Co-Registrar in New York.
     In Witness Whereof, the Corporation has caused this Certificate to be
signed in facsimile by its duly authorized officers and a facsimile of its
corporate seal to be affixed.
Dated:

<TABLE>
<S>                   <C>                  <C>                   <C>
COUNTERSIGNED AND     CHASE MELLON         [SEAL OF WORLD        /s/ C. Ian Ross
REGISTERED:           SHAREHOLDER          HEART CORPORATION]    ----------------------
CIBC MELLON TRUST     SERVICES LLC                               CHAIRMAN
COMPANY
Transfer Agent and    Co-Transfer Agent                          /s/ Virginia Schweitzer
Registrar             and Co-Registrar                           -----------------------
                                                                 SECRETARY
By:                   By:
   ---------------       ---------------
Authorized Officer    Authorized Officer
</TABLE>

<PAGE>

                                                                     EXHIBIT 4.1

                        Form of Common Share Certificate

                      [Reverse of Common Share Certificate]

THE CLASS OF SHARES THAT THIS CERTIFICATE REPRESENTS HAS RIGHTS, PRIVILEGES,
RESTRICTIONS AND CONDITIOINS ATTACHED THERETO AND THE CORPORATION WILL FURNISH
TO A SHAREHOLDER, ON DEMAND AND WITHOUT CHARGE, A FULL COPY OF THE TEXT OF (I)
THE RIGHTS, PRIVILEGES, RESTRICTIONS AND CONDITIONS ATTACHED TO EACH CLASS
AUTHORIZED TO BE ISSUED AND TO EACH SERIES INSOFAR AS THE SAME HAVE BEEN FIXED
BY THE DIRECTORS AND (II) THE AUTHORITY OF THE DIRECTORS TO FIX THE RIGHTS,
PRIVILEGES, RESTRICTIONS AND CONDITIONIS OF SUBSEQUENT SERIES.

The following abbreviations, when used in the inscription on the face of this
certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common         UNIF TRAN MIN ACT        Custodian
TEN ENT - as tenants by the                             -------          -------
          entirety                                      (Cust.)          (Minor)
JT TEN  - as joint tenants with        under Uniform Transfers to Minors Act
          right of survivorship
          and not as tenants in              -------------------------------
          common                                        (State)

                                       UNIF GIFT MIN ACT        Custodian
                                                        --------         -------
                                                         (Cust.)         (Minor)
                                       under Uniform Transfers to Minors Act

                                             -------------------------------
                                                        (State)

     Additional abbreviations may also be used though not in the above list

For Value Received,                        hereby sell, assign and transfer unto
                    ----------------------

--------------------------------------------------------------------------------
PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE
--------------------------------------------------------------------------------
(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE OF ASSIGNEE)
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
                      Common Shares of the Corporation represented by the within
---------------------
Certificate, and do hereby irrevocably constitute and appoint
                                Attorney to transfer the said stock on the books
-------------------------------
of the within named Corporation with full power of substitution in the premises.

Dated:
      ---------------------------

                                        ----------------------------------------
                                        NOTICE: The signature to this assignment
                                        must correspond with the name as written
                                        upon the face of this certificate in
                                        every particular, without alteration or
                                        enlargement or any change whatever.

SIGNATURE(S) GUARANTEED:

By
  ------------------------------------
THE SIGNATURE(S) SHOULD BE GUARANTEED
BY AN ELIGIBLE GUARANTOR INSTITUTION
(Banks, Stockbrokers, Savings and Loan
Associations and Credit Unions) WITH
MEMBERSHIP IN AN APPROVED SIGNATURE
GUARANTEE MEDALLION PROGRAM, PURSUANT
TO S.E.C. RULE 17Ad-15EXHIBIT 4.9

<TABLE>
<S>                             <C>                                           <C>
Ministry of Consumer and        Ministere des Services aux                    Ontario Corporation Number
Business Services               consommateurs et aux                          Numero de la societe en Ontario
CERTIFICATE                     entreprises
This is to certify that these   CERTIFICAT                                                  001168444
articles are effective on       Ceci certifie que les
                                presents status entrent en
                                vigueur le

                 NOVEMBER 26 NOVEMBRE, 2003
-------------------------------------------------------------
                         [signature]
                    Director / Directrice
Business Corporations Act / Loi sur les societes par actions
</TABLE>

--------------------------------------------------------------------------------
                                        ARTICLES OF AMENDMENT
                                       STATUTS DE MODIFICATION

   Form 3           1.   The name of the corporation is:
  Business               Denomination sociale actuelle de la societe:
Corporations
     Act                               WORLD HEART CORPORATION

  Formule 3         2.   The name of the corporation is changed to (if
 Loi sur les             applicable):
societes par             Nouvelle denomination sociale de la societe (s'il y a
   actions               lieu):

                    3.   Date of incorporation/amalgamation:
                         Date de la constitution ou de la fusion:

                                             1996-04-01
                                         (Year, Month, Day)
                                         (annee, mois, jour)

                    4.   Complete only if there is a change in the number of
                         directors or the minimum / maximum number of directors.
                         Il faut remplir cette partie seulement si le nombre
                         d'administrateurs ou si le nombre minimal ou maximal
                         d'administrateurs a change.

                         Number of directors is/are: or minimum and maximum
                                                     number of directors is/are:
                         Nombre d'administrateurs:   ou nombres minimum et
                                                     maximum d'administrateurs:
                         Number                      or minimum and maximum
                         Nombre                      ou minimum et maximum

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

                    5.   These articles of the corporation are amended as
                         follows:
                         Les statuts de la societe sont modifies de la
                         facon suivante:

                         By amending the rights, privileges, restrictions,
                         conditions and limitations attaching to the Cumulative
                         Redeemable Convertible Preferred Shares, Series A (the
                         "Series A Shares") as follows:
<PAGE>
                                                                     EXHIBIT 4.9

                         (a) designating clause "3.1 Right to Convert" as sub-
                             clause "3.1.1 Right to Convert"; and

                         (b) by inserting the following as an additional sub-
                             clause:

                         "3.1.2 Additional Right to Convert

                         3.1.2 Upon and subject to the terms and conditions
                         hereinafter set forth, the holders of Series A Shares
                         shall have the right, at any time ending up to the
                         close of business on June 30, 2007, or, in the case of
                         Series A Shares called for redemption after the Series
                         A Shares have become convertible, to the close of
                         business on the business day immediately preceding the
                         date fixed for redemption, whichever is earlier
                         (provided, however, that if the Corporation shall fail
                         to redeem such Series A Shares in accordance with the
                         notice of redemption the right of conversion shall
                         thereupon be restored as if such call for redemption
                         had not been made), to convert all, but not less than
                         all of their Series A Shares into fully paid and
                         non-assessable Common Shares for an aggregate for all
                         holders of 3,500,000 Common Shares plus warrants of the
                         Corporation exercisable for 7,000,000 Common Shares at
                         a price, for a term and with such other terms and
                         conditions as the board of directors shall from time to
                         time determine, subject to applicable stock exchange
                         and regulatory approval, and give notice thereof to the
                         holders of the Series A Shares prior to the issue of
                         such warrants."
<PAGE>

                                                                     EXHIBIT 4.9

                    6.   The amendment has been duly authorized as required by
                         sections 168 and 170 (as applicable) of the Business
                         Corporations Act.
                         La modification a ete dument autorisee conformement aux
                         articles 168 et 170 (selon le cas) de la Loi sur les
                         societes par actions.

                    7.   The resolution authorizing the amendment was approved
                         by the shareholders/directors (as applicable) of the
                         corporation on
                         Les actionnaries ou les administrateurs (selon le cas)
                         de la societe ont approuve la resolution autorisant la
                         modification le

                                             2003-Nov-25
                                         (Year, Month, Day)
                                         (annee, mois, jour)

                    These articles are signed in duplicate.
                    Les presents statuts sont signes en double exemplaire.

                                        WORLD HEART CORPORATION
                       (Name of Corporation) (if the name is to be changed by
                                these articles set out current name)
                                (Denomination sociale de la societe)
                               (Si l'on demande un changement de nom,
                         indquer ci-dessus la denomination sociale actuelle)

                    By/
                    Par:

                    /s/ Mark Goudie           CHIEF FINANCIAL OFFICER
                    (Signature)               (Description of Office)
                    (Signature)                      (Fonction)

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