Which of the following is NOT a sign of heart failure?

Decreased blood pressure is not typically considered a sign of heart failure. In the context of heart failure, the heart's ability to pump blood effectively is compromised, which can lead to various symptoms due to poor perfusion and fluid overload.

Signs of heart failure often include edema, which is the accumulation of fluid in the tissues; fatigue, which results from decreased cardiac output and insufficient oxygen delivery to muscles; and shortness of breath, commonly caused by fluid buildup in the lungs. While blood pressure can vary in heart failure, it often remains stable or may even be elevated due to compensatory mechanisms, making a consistent decrease in blood pressure less characteristic. Thus, decreased blood pressure is not typically recognized as a direct sign of heart failure.