Myocardial infarction is a serious type of coronary heart disease, and the occurrence of myocardial infarction often makes people feel like they are dying, and some people do die suddenly due to myocardial infarction. Therefore, for people who have had a history of myocardial infarction, what they need to pay attention to and what monitoring they need to do while taking medication as prescribed by the doctor, patients themselves and their families should pay attention to, summarized in the following aspects: Monitoring of risk factors for disease: blood lipids, blood glucose, high-sensitivity C-reactive protein, blood uric acid, etc. should be checked annually Monitoring of side effects of medication: 1, the use of statins to monitor blood liver function and CK, LDH, etc. 2, use of aspirin, Bolivar to monitor coagulation, such as fecal occult blood, subcutaneous bleeding, gum bleeding, etc. 3.Renal function tests are routinely performed. For the examination of coronary heart disease: for those with stable condition, 1-2 ECG per year, and visit the clinic for examination whenever the symptoms change. For post-stenting examination: the examination of the storage status of the stent lumen can be CTA or coronary angiography according to the doctor’s prescription. For the examination of cardiac function: Cardiac ultrasound should be performed once a year and the determination of cardiac function by ultrasound. Self-observation: 1. New “toothache”, “stomach pain”, “epigastric pain”, “upper arm pain” need to Exclude the possibility of angina pectoris, generally related to the activity of the heart is mostly related to myocardial ischemia, promptly seek medical advice. 2, bleeding black stool, acid reflux heartburn, may be related to the use of aspirin and other drugs caused by gastric disease, also need to promptly seek medical advice. 3.Significant increase in nocturia and foamy urine may be a serious problem of the kidneys, and prompt medical attention is recommended. 4. The presence of yellow skin color, deep yellow urine and poor appetite should exclude both liver problems and gastrointestinal problems.