Myocardial infarction and myocardial necrosis have no significant difference; both are caused by the blockage of coronary arteries leading to ischemic necrosis of the heart muscle. The mechanism of onset and the pathologic changes are the same. In the event of a myocardial infarction, immediate resuscitation treatment is necessary. Without timely treatment, the infarcted area may increase and complications can occur. Common complications include heart failure, arrhythmias, and cardiogenic shock, which can be severe enough to cause death. In the case of a myocardial infarction, it is essential to administer effective medications under the guidance of a doctor to reduce the infarcted area and minimize complications.