Added stress on the heart often results in shortness of breath or breathlessness. This is dyspnea and is a common indicator of a heart attack. This is not just the body indicating it needs rest. It can happen when the heart has trouble filling up and emptying efficiently. Eventually, this causes high blood pressure as fluid pools around the lungs. This symptom often occurs with other symptoms such as swelling of the ankles, fluid-weight gain, insomnia, difficulty breathing when lying in bed, and unusual fatigue.
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