1. Constant hacking at the throat
Persistent coughing or wheezing that produces white or pink mucus with blood tinge is another indicator of severe heart failure. This condition arises when fluid builds up in the lungs.

2. Edema.
Swelling of the feet, ankles, legs, and abdomen is caused by edema, which is caused by an abnormal accumulation of fluid in the body's tissues. It can also lead to weight gain and the associated danger of developing heart failure.

Because of the decreased blood flow, fluid builds up in the body's tissues when the heart's pumping rate slows. Since the kidneys are impaired in their function, less sodium and water are excreted, which adds to the retention of fluid in the body's tissues.

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