<P> Myocardial infarction complications may occur immediately following a heart attack (in the acute phase), or may need time to develop (a chronic problem). After an infarction, an obvious complication is a second infarction, which may occur in the domain of another atherosclerotic coronary artery, or in the same zone if there are any live cells left in the infarct . </P> <P> A myocardial infarction may compromise the function of the heart as a pump for the circulation, a state called heart failure . There are different types of heart failure; left - or right - sided (or bilateral) heart failure may occur depending on the affected part of the heart, and it is a low - output type of failure . If one of the heart valves is affected, this may cause dysfunction, such as mitral regurgitation in the case of left - sided coronary occlusion that disrupts the blood supply of the papillary muscles . The incidence of heart failure is particularly high in patients with diabetes and requires special management strategies . </P>

What is the most common complication of acute myocardial infarction