Heart failure (HF) is a condition in which a problem with the structure or function of the heart impairs its ability to provide sufficient blood flow to meet the body's needs. Symptoms can include shortness of breath, coughing, ankle swelling and reduced exercise capacity. The condition is often undiagnosed due to a lack of a universally agreed definition and challenges in definitive diagnosis. For additional information about heart failure, please see the links below:

heartfailure.org - Heart Failure Online
americanheart.org - American Heart Association
nhlbi.nih.gov - National Heart Lung & Blood Institute
hfsa.org - Heart Failure Society of America