Which of the following is a sign commonly associated with heart failure?

• A. Dyspnea
• B. Hypotension
• C. Hyperkalemia
• D. Rash

Answer: (A)

Shortness of breath is a hallmark sign of heart failure because fluid backs up when the heart can’t pump effectively. When the left side of the heart fails, blood that should be moving forward instead pools in the lungs, raising pressure in the pulmonary vessels and causing pulmonary edema. This makes breathing feel difficult, worsened by lying flat, and can lead to orthopnea or paroxysmal nocturnal dyspnea. The other options don’t fit as consistently: hypotension can occur in some advanced cases but isn’t the most common presenting sign, hyperkalemia is an electrolyte change rather than a presenting symptom of heart failure, and a rash isn’t related to the heart failure process. Recognizing dyspnea in this context helps identify fluid overload and the need for therapies to relieve congestion.