BROOMFIELD, Colo.--(BUSINESS WIRE)--ARCA biopharma, Inc. (Nasdaq:ABIO) today announced that the U.S. Food and Drug Administration (FDA) has designated as a Fast Track development program the investigation of GencaroTM, the Company’s investigational, pharmacologically unique beta-blocker and mild vasodilator, for the reduction of cardiovascular mortality and cardiovascular hospitalizations in a genotype-defined heart failure population. The Company intends to submit a study protocol for review under the FDA’s Special Protocol Assessment (SPA) process for the design of a clinical trial to assess the safety and efficacy of Gencaro in approximately 3,000 patients with chronic heart failure who have the genotype that appears to respond most favorably to Gencaro.