About Heart Failure

Heart failure, or HF, is a chronic, progressive condition in which a problem with the structure or function of the heart impairs its ability to supply sufficient blood flow to meet the body’s needs for blood and oxygen. Common causes of heart failure include myocardial infarction and other forms of ischemic heart disease, hypertension, valvular heart disease and cardiomyopathy. Heart failure is one of the largest health care problems in the United States and the rest of the world. Industry sources estimate that about 5.7 million Americans have HF and nearly 670,000 new patients are diagnosed annually. In addition, HF is the underlying reason for approximately 12 to 15 million annual visits to physicians, 6.5 million annual hospital days and over $37 billion in direct and indirect annual healthcare costs in the United States.

Beta-blockers are part of the current standard of care for HF, and are considered to be among the most effective drug classes for the disease. However, a significant percentage of eligible patients in the United States is not being treated with, or does not tolerate or respond well to, the beta-blockers currently approved for the treatment of HF. ARCA believes that new therapies for which patient response can be predicted before a drug is prescribed can help improve the current standard of practice in the treatment of HF.

About ARCA biopharma

ARCA biopharma is dedicated to developing genetically-targeted therapies for heart failure and other cardiovascular diseases. The Company's lead product candidate, Gencaro TM (bucindolol hydrochloride), is an investigational, pharmacologically unique beta-blocker and mild vasodilator being developed for heart failure. ARCA has identified common genetic variations that it believes predict individual patient response to Gencaro, giving it the potential to be the first genetically-targeted heart failure treatment. ARCA is collaborating with Laboratory Corporation of America to develop the companion genetic test for Gencaro. For more information please visit www.arcabiopharma.com.

Reference:1 – SHAPE (Study group on Heart failure Awareness and Perception in Europe) Survey Results to the General Public, Annual Congress of the European Society of Cardiology in Vienna, September 2003.