A myocardial infarction (heart attack) happens when the blood flow to a part of the heart is obstructed or blocked, usually by a buildup of plaque in the coronary arteries. This lack of blood flow can damage or destroy part of the heart muscle. Symptoms of a heart attack can include chest pain or discomfort, difficulty breathing, fatigue, lightheadedness, and nausea. According to the World Health Organization (WHO), cardiovascular disease (CVD), which includes heart attacks and stroke,...