Congestive heart failure (CHF) is a condition where the heart cannot pump enough blood to meet the body's needs. It is caused by conditions that damage the heart muscle such as coronary artery disease or high blood pressure, and symptoms include fatigue, shortness of breath, and swelling. CHF affects millions of people and is diagnosed through physical exams, tests, and scans before being treated through medications, surgery, lifestyle changes, and patient education on managing symptoms and risk factors.