The size of the possibility of cardiac rupture after myocardial infarction is closely related to the extent of myocardial infarction and the site of myocardial infarction. 1. The degree of myocardial infarction: the finer the occluded coronary branch, the earlier the time of restoring blood perfusion, the smaller the scope of myocardial infarction, the shallower the depth of infarction, i.e., a small range of submucosal infarction, the likelihood of rupture of the heart of such patients is very small, and if there is a wide range of transmural myocardial infarction, the likelihood of rupture of the heart will be higher. 2. The site of myocardial infarction: when the coronary artery is occluded and myocardial infarction occurs in the free wall of the left ventricle, it is easy to lead to cardiac rupture, and pericardial tamponade occurs rapidly, with a very high mortality rate. Infarction of the interventricular septum can easily lead to ventricular septal defect, while infarction of the papillary muscles of the heart can easily lead to rupture of the mitral tendon cords. Therefore, in the event of myocardial infarction, in addition to opening the blood vessels and restoring perfusion at the first opportunity, it is important to pay attention to the occurrence of various complications, especially cardiac rupture, which is difficult to treat and has a high mortality rate. If you feel unwell, it is recommended to go to the hospital for treatment.