Acute myocardial infarction, characterized by sudden onset, involves persistent angina, profuse sweating, a sense of impending doom, difficulty breathing, and chest tightness. Myocardial infarction, also known as heart attack, refers actually to the same condition and there is no difference between them. Once a myocardial infarction occurs, the patient should immediately go to the hospital for medical attention. Diagnostic tests such as an electrocardiogram, cardiac ultrasound, coronary CT, and coronary angiography should be conducted. These tests help determine the extent, severity, and location of the infarction, understand the degree of narrowing of the vessel, and develop a treatment plan to save the patient's life.