X0303 4 2010-10-19 0001024520 WORLD HEART CORP WHRT 0001441563 Delagardelle Jeani C/O NEW LEAF VENTURES 2500 SAND HILL ROAD, SUITE 203 MENLO PARK CA 94025 1 0 1 0 Common Stock 2010-10-19 4 P 0 2341920 2.135 A 6063603 I See Footnote 2 Warrants (right to buy) 2.31 2010-10-19 4 P 0 2341920 2.135 A 2010-10-19 2015-10-19 Common Stock 2341920 2341920 I See Footnote 2 Represents the per unit purchase price of a share of common stock and a five-year warrant to purchase one share of common stock. The Reporting Person is a member of New Leaf Venture Management II, L.L.C., the sole general partner of New Leaf Venture Associates II, L.P., the sole general partner of New Leaf Ventures II, L.P. ("NLV II"), which is the beneficial owner of 6,063,603 shares of the Issuer's common stock and warrants entitling NLV II to purchase 3,118,620 shares of the Issuer's common stock in the aggregate (including the warrants entitling NLV II to purchase 2,341,920 shares of the Issuer's common stock which are being reported herein). The Reporting Person disclaims beneficial ownership, within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the NLV II shares and warrants in which the Reporting Person has no actual pecuniary interest therein. /s/ Craig L. Slutzkin, as Attorney-in-Fact for Jeani Delagardelle 2010-10-21