Coronary heart disease is known as coronary atherosclerotic heart disease. Coronary heart attack narrowly refers to an acute coronary syndrome attack, including unstable angina, non-ST-segment elevation myocardial infarction and ST-segment elevation myocardial infarction, the latter two collectively referred to as acute myocardial infarction. Coronary heart attack requires a quick call to the emergency vehicle to send the patient to the hospital for treatment. During the time of waiting for the arrival of the emergency vehicle, simple treatment can be done according to the conditions at home: 1. Emotion: let the patient relax, smooth the mind, do not over-stress, avoid aggravating myocardial hypoxia and expanding the range of pain; 2. Position: under the premise that the patient can tolerate, consider sitting in the end position with both lower limbs hanging low, which can reduce This can reduce the cardiopulmonary blood volume and relieve the symptoms of dyspnea to a certain extent; 3, oxygen: if conditions are available, oxygen therapy can be given to increase the partial pressure of oxygen in the blood to improve myocardial blood supply and oxygen; 4, drugs: measure the patient’s blood pressure, if the systolic blood pressure is normal, nitrate drugs can be given orally, such as nitroglycerin sublingual, generally 5-10 minutes can gradually relieve. If the symptoms are still not relieved, an acute myocardial infarction may have occurred and urgent medical attention is needed. While performing the above treatment, information on the patient’s symptoms, such as the nature, location, extent, and duration of pain, needs to be collected. If chest pain has occurred before, you can compare whether the current onset is the same as the previous one. Upon arrival at the hospital, electrocardiogram and cardiac enzyme profile, troponin and other tests should be completed quickly, along with blood biochemical indexes such as routine blood, liver and kidney functions. Subsequently, treatment in the intensive care unit is required, including antithrombotic therapy, anti-myocardial ischemia therapy, hemodynamic reconstruction therapy and symptomatic treatment. Coronary heart attack is a common clinical medical emergency. Please follow the doctor’s advice when treating it to avoid delaying treatment due to indecision, which may result in serious consequences.