The treatment outcome of acute heart attack is mainly related to whether it is rapidly diagnosed and treated, so early detection and early hospitalization should be very important. If the pain in the precordial region lasts for more than 20 minutes and worsens after activity, accompanied by sweating, the attack of myocardial infarction is highly suspected, self-help should be taken as follows: 1. Stop activity and rest in bed or sitting position: If the above-mentioned symptoms of chest pain occur, stop activity and rest in bed or sitting position. Take 1-2 tablets of nitroglycerin under the tongue, call your family, and call the emergency number at the same time. 2. Call the emergency number or go to the hospital emergency room as soon as possible: call 120 for family members; or call 120 for yourself; inform the suspected heart attack and where you are. Beijing can also call 999. if close to the hospital, the time to the hospital on their own is shorter than the arrival time of the ambulance, the patient’s blood pressure is above 90/60mmHg, heart rate is between 50-100 times / min, you can be escorted to the hospital by a family member in a car as soon as possible, the patient to avoid walking to. 3, waiting for the ambulance to come: waiting for rescuers to arrive during this time, the rescue of the patient’s side, directly determine the success rate of rescue after the arrival of professionals. Family members assist the patient to take nitroglycerin sublingually, no more than 2 tablets; quickly collect information on previous visits; when there is a condition for blood pressure measurement, make sure to measure blood pressure first, and do not use nitroglycerin for patients with low blood pressure. Family members should calm the patient and avoid excessive stress. If the blood pressure is lower than 160/90mmHg, chew 300mg of aspirin. 4.Transfer hospital standard: Prefer a hospital that can perform 24-hour coronary intervention, perform coronary stent implantation to open the blood vessel as soon as possible, generally tertiary hospitals have this technology; but some counties and towns do not have hospitals to carry out coronary intervention, do not delay the opening of the blood vessel, you can first go to the county hospital thrombolysis treatment Then transfer to a hospital that has the ability to do coronary intervention. Calling the emergency number can be guided by doctors, and early diagnosis and treatment can be carried out during transportation. Moreover, EMS allows the hospital to start the emergency green channel quickly and reduce in-hospital delay. Therefore, calling the emergency number is safer than going to the hospital by yourself.