Shortness of breath - The best known symptom of heart failure is probably "dyspnea," or, shortness of breath. This may result from excess fluid in the lungs. Breathing difficulties may occur at rest or during exercise. In some cases, congestion may be severe enough to prevent or interrupt sleep.

Tiredness - As the heart's pumping capacity decreases, muscles and other tissues receive less of the oxygen and nutrition which are carried in the blood. Without proper "fuel," the body cannot perform as much work. This is felt as fatigue.

Swelling - Fluid may accumulate causing swelling of the feet, ankles, legs and, sometimes, the abdomen. Excess fluid retained by the body may result in weight gain that can occur fairly rapidly.

Persistent coughing - Some people cough up mucus or pink sputum. There may be raspy breathing or wheezing.