ARCA biopharma, Inc. (ARCA), formerly Nuvelo, Inc. is a biopharmaceutical company focused on developing genetically-targeted therapies for heart failure and other cardiovascular diseases. ARCA’s lead product candidate Gencaro (bucindolol hydrochloride), a beta-blocker and mild vasodilator is under review by the United States Food and Drug Administration (FDA), for chronic heart failure (HF). Gencaro is an oral tablet formulation, dosed twice daily. On January 27, 2009, Nuvelo, Inc. (Nuvelo) completed the merger with ARCA biopharma, Inc. (ABI). Pursuant to the Merger, Dawn Acquisition Sub, Inc. merged with and into ABI, with ABI continuing after the merger as the surviving company and a wholly owned subsidiary of Nuvelo. Pursuant to the Merger, ABI changed its name to ARCA biopharma Colorado, Inc. and Nuvelo changed its name to ARCA biopharma, Inc.