Which of the following is a sign of a heart attack?

Chest discomfort is a classic and significant sign of a heart attack. It may manifest as a feeling of pressure, squeezing, fullness, or pain in the center or left side of the chest. This discomfort can also radiate to the shoulders, neck, arms, back, teeth, or jaw, indicating that the heart muscle may not be receiving enough oxygen due to a blockage in the coronary arteries. Recognizing chest discomfort is crucial for early intervention and effective treatment, as prompt response to heart attack symptoms can significantly improve outcomes for the patient.

Other signs, such as headache, nausea, and fever, can arise from various medical conditions and are not specifically indicative of a heart attack. While nausea can accompany a heart attack, it is not as direct a signal as chest discomfort. Therefore, identifying chest discomfort as a key sign aids in the rapid recognition and response necessary for effective first aid and medical assistance in cases of suspected heart attacks.