1. Avoid overexertion and sudden exertion. The common causes of myocardial infarction in elderly patients with coronary heart disease are: constipation caused by heavy physical labor and sudden exertion. Because in this state, you need to hold your breath, which will inevitably lead to myocardial ischemia and induce myocardial infarction. 2. Pay attention to the weather changes at any time. Patients with coronary heart disease have low self-resistance, and their bodies are sensitive to temperature changes. Coronary artery spasm will occur in cold weather, leading to myocardial infarction, so patients with coronary heart disease should pay attention to cold and warmth when strong cold air comes. Medical data show that low temperature, rainy weather and strong wind are one of the important causes of acute myocardial infarction.

3. Cultivate self-cultivation and relax. Everything should be handled peacefully to avoid getting excited. It is reported that a retired old man was too excited to win money by playing mahjong, which led to myocardial infarction. Therefore, people with coronary heart disease should be calm.

4. Deal with the symptoms of myocardial infarction in time. Before the onset of myocardial infarction, 70% patients have premonitory symptoms, so we should know how to identify the premonitory symptoms of myocardial infarction and adopt correct treatment methods. The main premonitory symptoms are as follows: (1) Sudden angina pectoris with obvious severity. (2) Pain accompanied by dizziness, nausea, vomiting, sweating or obvious bradycardia. (3) The symptoms of angina pectoris are worse than before, and there is no obvious effect after taking nitroglycerin. Often accompanied by pulmonary edema and asthma, blood pressure drop, and even shock and other symptoms. (4) ECG is obviously abnormal.