Acute myocardial infarction is caused by blockage or total blockage of the coronary arteries that supply blood to the heart muscle, resulting in myocardial ischemia and hypoxia, which makes the heart muscle necrotic. When the area of myocardial necrosis becomes too large, the heart will stop, eventually leading to the patient’s death. On average, a heart attack occurs every 3 seconds in China, and since 2005, the mortality rate has been gradually increasing and gradually showing a younger trend. At present, it is estimated that there are 2.5 million heart attack patients in China, of which only 5% have received timely and reasonable treatment, and shortening the time of heart attack treatment is crucial to reduce their mortality. Attention! These 4 symptoms may be the precursors of heart attack In life, most people do not understand the general knowledge of heart attack, and even less able to recognize whether it is a heart attack. In fact, not all infarction attacks in the clinic have aura, but usually 50% to 80% of patients will have some warning symptoms before the attack. 1, a long period of angina: most people will suddenly find angina that lasts more than 20 min, and patients who have had angina in the past, the symptoms are aggravated and prolonged. It is also accompanied by irritability, sweating, fear or a sense of near death; 2. Gastrointestinal reactions: many people will also experience gastrointestinal symptoms such as nausea, vomiting and diarrhea; 3. Symptoms such as shock and fainting: a few people will not feel pain, but direct shock and fainting; 4. Generalized pain related to exertion: patients will experience body pain as soon as they exert themselves or become excited, and the pain will disappear as soon as they rest. The pain is not necessarily heart-related, but may be shoulder pain, back pain, stomach pain or maybe even toothache or diarrhea. If you have symptoms, lie down immediately and call 120 to save your life When you and others around you have these symptoms, you should highly suspect that an acute heart attack has occurred, do not carry on and bear it! Immediately lie down and call 120 as fast as you can, and call an emergency vehicle. Even if there are drugs such as nitroglycerin at home, it can only temporarily relieve the symptoms but not effectively treat them. After taking the medication, you should also wait for the arrival of the emergency vehicle, do not go to the hospital by yourself! Because the emergency vehicle is equipped with highly trained ambulance personnel, after arriving at the scene, can quickly make a preliminary diagnosis, and quickly start the emergency green channel, to save lives time. Winter heart attack season, prevention can not be relaxed Heart attack is not the patent of patients who have clearly suffered from coronary heart disease, hypertension, diabetes, hyperlipidemia patients are a high-risk group of heart attack. Patients with hypertension, diabetes and hyperlipidemia are at high risk for heart attack. Bad habits such as smoking, alcoholism and staying up late are risk factors for heart attack, and winter is a high incidence season for heart attack. People at risk need to pay extra attention to restrain bad habits and always be alert to physical abnormalities.