Patients with heart attacks do not necessarily have high blood pressure. Some patients with heart attack may have hypertension, which can also lead to lesions in the coronary arteries and induce myocardial infarction. However, patients with coronary artery disease do not necessarily have hypertension. Myocardial infarction is an acute blockage of the coronary arteries, resulting in a complete interruption of the blood supply to the myocardium in the corresponding region, and complete necrosis of the myocardium will occur. Most patients with myocardial infarction have a history of coronary atherosclerosis, in which a narrowing of the coronary arteries occurs on top of the atherosclerosis, and thrombus formation occurs suddenly on top of the narrowing. Some patients may have arteritis and coronary artery aneurysms, which can also lead to a sudden onset of myocardial infarction. Patients with myocardial infarction should pay attention to strengthening the monitoring of blood pressure, and those who are found to have elevated blood pressure should be given comprehensive treatments such as lowering blood pressure under the guidance of a doctor in a timely manner.