For myocardial infarction (referred to as heart attack), it is always customary to think that the infarction should be accompanied by severe pain in the precordial region or behind the sternum, and often accompanied by chest tightness, breath-holding, nausea, vomiting, pallor, profuse sweating, palpitations, fear and a sense of near death. However, epidemiological studies show that 16.67% to 33.33% of patients with acute heart attack have atypical symptoms, and the same heart attack is presented in very different forms. These different manifestations of heart attack are like killers in disguise, which may make patients let down their guard and miss the best time for treatment. Let’s take a look at these uncommon heart attacks and their manifestations. 1. Pain in the left shoulder and left armpit: Heart disease can cause pain in the left arm and left shoulder, sometimes reflecting back to the right arm. The pain is usually dull rather than sharp and is usually limited to the inner forearm, with the possibility of radiation to the little and ring fingers. Especially when it is accompanied by chest tightness and tightness of breath, you should be more alert to heart attack. 2, epigastric and back pain: When epigastric pain is accompanied by nausea, it is often thought to be a disease of the digestive system, but it may also be a symptom caused by heart attack, and so is back pain, and the pain sensation and the specific location sometimes cannot be estimated by oneself, but if both of the above are accompanied by nausea and vomiting, and the epigastric pain has a squeezing sensation, it is still not good to ignore the possibility of heart attack. 3, neck pain, sore throat: sore throat, pungent feeling in the throat is also an atypical manifestation of heart attack. The nerves of the throat and the heart are innervated by the same segment of the spinal nerve. When the myocardium is ischemic and hypoxic, the acidic substances and peptides produced will stimulate the nerves to produce pain and spread to the nerves of the throat. If there is a sudden feeling of blockage in the throat with symptoms such as poor breathing and profuse sweating, and there is no asthma or upper respiratory tract infection, heart attack should be considered. 4. Jaw pain and toothache: In a few cases, heart attack can be manifested as toothache or jaw pain, but it often has more than just toothache, and most of them will be accompanied by some other manifestations, including chest pain, shoulder pain, cold sweat, near-death feeling and so on. In addition, this kind of toothache is also related to movement. It does not hurt when people are at rest, but it hurts when they walk or move, or it hurts more than once. 5. Left lower limb and left groin pain: Sudden severe pain in the left lower limb, chest tightness, breath-holding and sweating should alert you to acute heart attack. 6.Migraine and nasal pain: There are also a few heart attack patients who come to the clinic with migraine or nasal pain, which should also draw attention. 7. Painlessness: A considerable number of patients will present with painless myocardial infarction, that is, there can be neither pain nor any symptoms at the onset of heart attack. Because of its lack of necessary warning symptoms, it is easy to be ignored and more dangerous. If you have a history of coronary heart disease, or have atherosclerosis susceptibility factors, such as advanced age, hypertension, diabetes, hyperlipidemia, smoking, obesity, family history of early onset cardiovascular disease, you must go to the hospital for regular medical checkups and be alert to the possibility of acute heart attack when the above atypical symptoms occur, and go to the hospital for examination and treatment as soon as possible.