Coronary heart disease is coronary atherosclerotic heart disease, clinical manifestations of angina pectoris or myocardial infarction. It is necessary for coronary heart patients to carry first-aid drugs with them, and often prepare first-aid drugs including the following: 1. nitroglycerin or quick-acting heart pills, which can be taken immediately when myocardial ischemia and angina attack occurs and can quickly relieve symptoms within 3-5 minutes. 2. The release of catecholamines and other vasoconstrictive substances can increase blood pressure, heart rate and myocardial consumption, so timely administration of beta-blockers, such as metoprolol tartrate or bisoprolol fumarate, can effectively stabilize blood pressure and heart rate, relieve myocardial ischemia and prevent sudden death. effective.