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

A key sign of a heart attack is the presence of chest discomfort that may radiate to the arms, back, neck, jaw, or stomach. This discomfort can present as pressure, squeezing, or even pain and may last for several minutes or come and go. Recognizing this symptom is crucial because it can signal that the heart is not receiving enough blood, leading to possible heart damage if not addressed quickly.

Other symptoms associated with a heart attack can include shortness of breath, cold sweat, nausea, or lightheadedness. Notably, the pain or discomfort can vary from person to person, and it may not always be severe; some individuals may experience mild sensations. Thus, being aware of the broader range of symptoms, especially those outlined in option B, is vital for timely medical intervention.