EXHIBIT 1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them a Statement on Schedule 13G (including amendments thereto) with regard to the common stock of World Heart Corporation and further agree that this Joint Filing Agreement be included as an Exhibit to such joint filings. In evidence thereof, the undersigned, being duly authorized, hereby execute this Joint Filing Agreement as of February 12, 2008.

/s/ Reid S. Walker

REID S. WALKER

/s/ G. Stacy Smith

G. STACY SMITH

/s/ Patrick P. Walker

PATRICK P. WALKER

/s/ Steven R. Becker

STEVEN R. BECKER

WS CAPITAL, L.L.C.

By: /s/ Reid S. Walker

Reid S. Walker, Member

WS CAPITAL MANAGEMENT, L.P.

By: WS Capital, L.L.C., its general partner

By: /s/ Reid S. Walker

Reid S. Walker, Member

WSV MANAGEMENT, L.L.C.

By: /s/ Reid S. Walker

Reid S. Walker, Member

WS VENTURES MANAGEMENT, L.P.

By: WSV Management, L.L.C., its general partner

By: /s/ Reid S. Walker

Reid S. Walker, Member