Heart attack is one of the common medical emergencies in the emergency department and one of the most common fatal diseases today. When a patient has a heart attack, he or she should immediately rest in bed and call an emergency number. If the patient is able to tolerate it, sitting position with both lower limbs hanging low can be considered to reduce cardiopulmonary blood volume and relieve respiratory distress to some extent. If available, oxygen therapy can be given to increase the partial pressure of oxygen in the blood and improve the blood and oxygen supply to the heart muscle. Measure blood pressure and if the systolic blood pressure is normal, nitroglycerin can be given sublingually or orally. 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, and if chest pain has occurred before, the current onset can be compared to whether it is the same as before. After the patient arrives at the hospital, an electrocardiogram, and cardiac enzyme profile, troponin, etc. are quickly completed, along with routine blood tests, liver and kidney functions, etc. Treatment includes the following: 1. General treatment: bed rest, continuous cardiac monitoring of vital signs, oxygen, and sedation and analgesics according to the patient’s condition. Patients eat liquid food within 2-3 days after the onset of the disease, with small and frequent meals, gradually transition to a normal diet, and keep the bowels unobstructed; 2, antithrombotic therapy: take aspirin enteric tablets, clopidogrel hydrogen sulfate, etc. as prescribed by the doctor; 3, anti-myocardial ischemic therapy: take drugs under the guidance of the doctor, such as nitroglycerin, isosorbide nitrate, morphine, beta-blockers, statins, etc.; 4, coronary artery blood flow reconstruction therapy. Including thrombolytic therapy, interventional therapy and coronary artery bypass grafting. At present, interventional therapy is the main method to open coronary vessels; 5. Anti-arrhythmic treatment: occasional ventricular premature beats need to be closely observed and do not need to be treated with drugs; for frequent ventricular premature beats, use lidocaine intravenously as prescribed by the doctor, and if there is still no effect, amiodarone intravenous injection can be chosen. If ventricular tachycardia causes a decrease in blood pressure or ventricular fibrillation occurs, electric defibrillation should be used immediately; 6. Anti-shock treatment: use dobutamine and dobutamine as prescribed by the doctor, if the blood pressure is stable, add a small amount of sodium nitroprusside and monitor the patient’s vital signs closely.