Exhibit
4.1


INCORPORATED UNDER
THE LAWS OF CANADA


WORLD
HEART


TECHNOLOGY for LIFE


	
  NUMBER

  

  WHC1932976

  	
   

  	
        SHARES

  *12345678901********

  **12345678901*******

  ***12345678901******

  ****12345678901*****

  *****12345678901****



  



 


This
Certifies That


PROOF * VHC1532976
* CA9809053015 * 12345678901 FULLY PAID AND NON-ASSESSABLE COMMON SHARES, WITHOUT
NORMAL OR PAR VALUE OF WORLD HEART CORPORATION * WORLD HEART CORPORATION * PROOF
* WHC1932976 * CA9809053015 * 12345678901 FULLY PAID AND NON-ASSESSABLE COMMON
SHARES. [ILLEGIBLE] OF WORLD HEART CORPORATION * WORLD HEART CORPORATION *
PROOF * WHC1932976 * CA5869053015 * 12345678901 FULL PAID NON-ASSESSABLE COMMON
SHARES, WITHOUT NORMAL OR PAR VALUE, OF WORLD HEART CORPORATION [ILLEGIBLE] * WORLD
HEART CORPORATION * PROOF * WHC1932976 * CA9809053015 * 12345678901 FULLY PAID
AND NON-ASSESSABLE COMMON SHARES WITHOUT NOMINAL OR PAR VALUE OF WORLD HEART
CORPORATION * WORLD HEART CORPORATION * PROOF * WHC1932976 * CA9809053015 * 12345678901FULLY
PAID AND NON-ASSESSABLE COMMON SHARES, WITHOUT NOMINAL OR PAR VALUE, OF WORLD
HEART CORPORATION * WORLD HEART CORPORATION * PROOF * WHC1932976 * CA9809053015
* 12345678901 FULLY PAID AND NON-ASSESSABLE COMMON SHARES, WITHOUT NOMINAL OR
PAR VALUE OF WORLD HEART CORPORATION * WORLD HEART CORPORATION * PROOF
WHC1932976 * CA9809353015 * 12345678901 FULLY PAID AND NON


Is The Registered
Holder Of


	
  * PROOF * WHC1932976 * CA9809053015 * 12345678901
  FULLY PAID AND NON-ASSESSABLE COMMON SHARES WITHOUT NOMINAL OR PAR VALUE OF
  WORLD HEART CORPORATION * WORLD HEART CORPORATION * [ILLEGIBLE] * CA9809053015
  * 12345678901 FULLY PAID AND NON-ASSESSABLE COMMON SHARES, WITHOUT NOMINAL OR
  PAR VALUE, OF WORLD HEART CORPORATION * WORLD HEART CORPORATION * PROOF * WHC1932976
  *

  	
   

  	
  ISIN: CA9809053015

  CUSIP: 980905301

  



 


FULLY
PAID AND NON-ASSESSABLE COMMON SHARES, WITHOUT NOMINAL OR PAR VALUE, OF WORLD
HEART CORPORATION


transferable only on the
books of the Corporation by the registered holder hereof in person or by Attorney
duly authorized in writing upon surrender of this Certificate properly
endorsed.


This Certificate is no
valid until countersigned and registered by the Registrar and Transfer Agent
duly authorized by the Corporation.


IN WITNESS WHEREOF the
Corporation has caused this Certificate to be signed by the facsimile signature
of its duly authorized officers.


	
  

  	
  DATED: MAY 25, 2007

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  COUNTERSIGNED AND REGISTERED

  
	
  President and CEO

  	
  CIBC MELLON TRUST COMPANY

  
	
   

  	
  REGISTRAR AND TRANSFER AGENT

  OR MELLON INVESTOR SERVICES LLC

  
	
   

  	
  CO-TRANSFER AGENT AND CO-REGISTRAR

  
	
   

  	
   

  
	
   

  	
  BY:

  	
   

  	
   

  
	
  Secretary

  	
   

  	
  Authorized
  Signature

  	
   

  
	
   

  	
   

  	
   

  



 


The shares represented by
this certificate are transferable at the office of CIBC Mellon on Trust Company
in Toronto, Ontario and Mellon Investor Services, LLC in Jersey City, NI, USA


	
  84740140 G PROOF 00050449

  	
   

  	
  SECURITY INSTRUCTIONS ON REVERSE VOIR LES
  INSTRUCTIONS DE SECURITÉ AU VERSO

  	
   

  	
  999999999 G3275339

  



 











For value received, the
undersigned hereby sell(s), assign(s) and transfer(s) unto
                                                                                                                                                                                                         

(Print name(s) of person(s) to whom the securities are being transferred and
the address for the register)
                                                                                                                                                                                                                           shares
(number of shares if blank, deemed to be all) shares of the Company represented
by this certificate, and hereby irrevocably constitutes and appoints
                                                                        
the attorney of the undersigned to transfer the said securities with full power
of substitution in this matter:


	
  Dated 

  	
   

  	
   

  	
   

  	
   

  



 


	
  

  	
   

  	
   

  
	
  Signature Guarantee(s)*

  	
   

  	
  Transferor(s) Signature(s)*

  
	
  (the transfer cannot be processed without

  acceptable guarantees of all signatures)

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  



 






* For transfers signed by
the registered holder(s), their signature(s) must correspond with the name(s)
on the certificate in every particular, without any changes. In addition, every
signature must be Signature Guaranteed
by a Canadian Schedule 1 chartered bank, a major trust company in Canada, or a
member of one of the recognized medallion programs - Securities Transfer Agents
Medallion Program (STAMP), Stock Exchanges Medallion Program (SEMP) or New York
Stock Exchange, Inc. Medallion Signature Program (MSP).


THE CLASS OF SHARES THAT
THIS CERTIFICATE REPRESENTS HAS RIGHTS, PREVILEGES, RESTRICTIONS AND CONDITIONS
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 INSOPAR AS THE SAME HAVE BEEN FIXED BY THE DIRECTORS, AND (ii)
THE AUTHORITY OF THE DIRECTORS TO FIX THE RIGHTS, PRIVILEGES, RESTRICTIONS AND
CONDITIONS OF SUBSEQUENT SERIES.


SECURITY INSTRUCTIONS -
INSTRUCTIONS DE SÉCURITÉ


THIS IS WATERMARKED PAPER, DO NOT ACCEPT WITHOUT NOTING WATERMARK. HOLD
TO LIGHT OT VERIFY WATERMARK.


PAPIER FILIGRANÉ. NE PAS
ACCEPTER SANS VÉRIFIER LA PRÉSENCE DU FILIGRANE. POUR CE FAIRE, PLACER À LA
LUMIERE.