X0303 4 2010-10-19 0001024520 WORLD HEART CORP WHRT 0001441439 New Leaf Ventures II, L.P. C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK NY 10036 0 0 1 0 0001441858 New Leaf Venture Associates II, L.P. C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK NY 10036 0 0 1 0 0001441857 New Leaf Venture Management II, L.L.C. C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK NY 10036 0 0 1 0 0001192212 CHAMBON PHILIPPE C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK NY 10036 0 0 1 0 0001231092 NIEDEL JAMES C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK NY 10036 0 0 1 0 0001340806 Lathi Vijay K C/O NEW LEAF VENTURES 2500 SAND HILL ROAD, SUITE 203 MENLO PARK CA 94025 0 0 1 0 0001247851 HUNT RONALD C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK NY 10036 0 0 1 0 0001253170 AKKARAJU SRINIVAS C/O NEW LEAF VENTURES 2500 SAND HILL ROAD, SUITE 203 MENLO PARK CA 94025 0 0 1 0 Common Stock 2010-10-19 4 P 0 2341920 2.135 A 6063603 D 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 D 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 securities are directly held by New Leaf Ventures II, L.P. ("NLV II") and indirectly held by New Leaf Venture Associates II, L.P. ("NLV Associates"), the sole general partner of NLV II, New Leaf Venture Management II, L.L.C. ("NLV Management"), the sole general partner of NLV Associates, and the individual managers of NLV Management (NLV Associates, NLV Management and the individual managers of NLV Management each, an "Indirect Reporting Person"). The individual managers of NLV Management filing jointly with NLV II, NLV Associates and NLV Management are Philippe O. Chambon, James Niedel, Vijay Lathi, Ronald Hunt and Srinivas Akkaraju. Each Indirect 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 such Indirect Reporting Person has no actual pecuniary interest therein. /s/ Craig L. Slutzkin, Chief Financial Officer 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. 2010-10-21 /s/ Craig L. Slutzkin, Chief Financial Officer of New Leaf Venture Management II, L.L.C., the sole general partner of New Leaf Venture Associates II, L.P. 2010-10-21 /s/ Craig L. Slutzkin, Chief Financial Officer of New Leaf Venture Management II, L.L.C. 2010-10-21 /s/ Craig L. Slutzkin, as Attorney-in-Fact for Philippe O. Chambon 2010-10-21 /s/ Craig L. Slutzkin, as Attorney-in-Fact for James Niedel 2010-10-21 /s/ Craig L. Slutzkin, as Attorney-in-Fact for Vijay Lathi 2010-10-21 /s/ Craig L. Slutzkin, as Attorney-in-Fact for Ronald Hunt 2010-10-21 /s/ Craig L. Slutzkin, as Attorney-in-Fact for Srinivas Akkaraju 2010-10-21