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

A severe headache is not typically recognized as a classic sign of a heart attack. Signs of a heart attack commonly include chest pain, which may feel like pressure, squeezing, or fullness in the center or left side of the chest. Nausea can occur as part of the body's response to the stress of a heart attack, as can shortness of breath, which may accompany chest discomfort or even occur independently.

Understanding these symptoms is vital because during a heart attack, the heart muscle is not receiving enough oxygen due to blocked arteries. Recognizing these typical signs can lead to prompt medical attention, which is essential in minimizing heart damage and improving survival rates.