. In this review we aim to update and discuss knowledge of myocardial infarction with respect to risk factors, pathophysiology, types or classification, clinical manifestations, diagnosis and treatment in a concise and simplified manner in order to define a simple comprehensive guide for clinicians. The available literature has been searched, reviewed, studied, analyzed, written in a simple understanding method, discussed and concluded. For prophylaxis, it has been found that moderate muscular exercise, regular consumption of fresh vegetables and fruits, avoidance of smoking and stress, and low consumption of fat are associated with reduced risk of coronary heart disease in populations of all ag