Once a heart attack occurs, the heart rate is increased most of the time. Because of the painful stimulus that results in an infarction, the patient will be nervous and even feel a sense of frequency of death, cold sweat, difficulty breathing and even fear, when the heart rate is significantly higher than the usual normal heart rate. In the event of a heart attack, the first step is to chew four aspirin or two Tegretol, and take nitroglycerin under the tongue to combat the symptoms of angina, and call 120 and wait for the arrival of medical staff. Upon arrival at the hospital, a detailed examination is required, most notably a coronary angiogram, which will clarify the degree of luminal stenosis and the severity of the infarction to evaluate the next treatment plan.