Complications can be roughly categorized as Electrical dysfunction (conduction disturbance, arrhythmias) Mechanical dysfunction (heart failure, myocardial rupture or aneurysm, papillary muscle dysfunction) Thrombotic complications (recurrent coronary ischemia, mural thrombosis) Inflammatory complications (pericarditis, post-myocardial infarction syndrome) Electrical dysfunction occurs in > 90% of myocardial infarction (MI) patients (see also Arrhythmias and Conduction Disorders).