Chest pain during pregnancy is defined as chest pain that occurs during pregnancy. Most of the chest pains that occur during pregnancy have anterior cardiac pain or angina pectoris as the clinical manifestation. It is caused by gestational myocardial infarction. Myocardial infarction of pregnancy is a rare complication of pregnancy. It is rarely reported in China. This type of myocardial infarction is different from other types of myocardial infarction because it not only endangers the life of the pregnant woman, but also poses a threat to the fetus. The clinical manifestations of myocardial infarction in pregnancy are very important for the diagnosis and reference. What are the causes of chest pain during pregnancy? 1, there are family genetic factors Positive family history of myocardial infarction before the age of 60, such as positive family history of hyperlipidemia, hypertension, diabetes mellitus. 2.Disease factors Various conditions of abnormal lipid metabolism, such as persistent or refractory hypertension, diabetes. 3, adverse factors Smoking, alcoholism, drug abuse. 4.Environmental factors Women with type A personality and those with emotional instability and stressful life. 5, pregnancy-related disease factors Pregnancy eclampsia, gestational diabetes mellitus; pregnancy thromboembolic complications (occurring on the basis of thrombophlebitis, myocarditis, chronic atrial fibrillation, atrioventricular block, bacterial endocarditis, primary cardiomyopathy, etc.). 6.Female endocrine-related factors Insufficient female hormone secretion, amenorrhea or artificial menopause, long-term oral contraceptive drugs. 7, other factors Congenital anomalies, such as abnormal origin of coronary arteries and aortic valve stenosis, coronary arteritis, hypertrophic cardiomyopathy, vasospasm, etc. According to foreign reports, coronary angiography is often normal in patients with myocardial infarction complicated by pregnancy. It is speculated that this may be due to reduced coronary blood flow due to spasm or local thrombosis. The cause of spasm is unclear, and it is considered that it may be related to pregnancy complicated by hypertension, or the use of drugs such as oxytocin. There is also coronary artery entrapment separation during pregnancy or postpartum is a common cause. Most of the chest pains that appear during pregnancy are clinically manifested by pain in the precordial region or angina pectoris, and it is often easy to confuse this pain clinically with heartburn due to esophageal and/or digestive tract (gastric acid irritation, pyloric spasm, ulcer disease) lesions. Therefore, clinical screening should be performed for the presence of chest pain or angina pectoris during pregnancy, especially in acute patients with sweating, generalized tightness, or persistent progressive worsening of chest pain after general management, myocardial infarction in pregnancy should be highly suspected.