Which of the following is NOT a symptom of a heart attack?

Dizziness from standing up too fast is not a symptom of a heart attack because it typically relates to changes in blood pressure, which can occur for various reasons, including dehydration or standing up too quickly. On the other hand, the symptoms of a heart attack, such as chest discomfort, shortness of breath, and cold sweat, are directly connected to the heart's function and the body's response to reduced blood flow or oxygen to the heart muscle. Recognizing the specific symptoms of a heart attack is critical for timely medical intervention, while dizziness from positional changes is generally not indicative of a cardiac event.