What is a heart attack, and what are its signs?
A heart attack occurs when the blood flow to a part of the heart is blocked, usually by a blood clot, causing damage to the heart muscle. Common signs include chest pain or discomfort that may spread to the arms, neck, jaw, or back, shortness of breath, sweating, nausea or vomiting, lightheadedness, and a feeling of extreme weakness or anxiety. Some people, especially women, older adults, or those with diabetes, may experience less typical symptoms such as fatigue, indigestion, or unusual discomfort. A heart attack is a medical emergency and requires immediate medical attention.