ARCA biopharma, Inc., a biopharmaceutical company, focuses on developing genetically-targeted therapies for cardiovascular diseases. Its lead product candidate is Gencaro, a pharmacologically unique beta-blocker and mild vasodilator for the treatment of atrial fibrillation in patients with heart failure and left ventricular dysfunction. ARCA biopharma, Inc. is headquartered in Broomfield, Colorado.