In the background, if the heart can’t supply enough oxygen-rich blood to meet the body’s needs, you may experience some symptoms that don’t point directly at heart failure, such as:
Shortness of breath following activity or when lying down.
Fatigue, reduced ability to exercise, and weakness.
Swelling of the lower legs, ankles, and feet.
Wheezing or a cough that doesn’t go away or produces white or pink mucus with blood spots.
Swelling of the abdomen or very rapid weight gain (from fluid retention).
Nausea and lack of appetite.
Difficulty in concentration.
Decreased alertness.