Page 1 of 13Clinical Characteristics and Short as Well as Intermediate Term Prognosis of Myocardial Infarction With Normal Coronary Angiogram Hamza Kabil MD; Ahmed Abdelmonem MD; Saad Ammar MD; Sayed Abdelkhalek MD;and Sherif Sabry MBBch. Cardiology Department, Faculty of Medicine, Benha University, Egypt. ABSTRACT: Background: Myocardial infarction although generally is associated with obstructive coronary artery disease, there has been increasing reports of cases presenting with this disease and have an apparent normal coronary angiogram. Various mechanisms have been hypothesized but no actual single theory has been proven to be the cause of such cases to occur. Aim: We sought to study patients with myocardial infarction and normal coronary angiograms as regards their risk factors and follow them up to determine their short and intermediate term prognosis. Methods: We enrolled 40 consecutive patients referred to coronary care units (CCU) of both Cairo General Transport Authority hospital and the Electricity hospital from the period from December 2006 till April 2008. They all were diagnosed by the AHA definition of myocardial infarction and were divided into group 1 who had an apparently normal epicardial coronary vessels and group 2 who had a more than 50% reduction of at least one epicardial coronary vessel. All patients were assessed for factors ascertaining abnormal coagulation, holter ECG monitoring, and echocardiographic evaluation. Follow up for all patients was extended for up to 6 months as regards the major adverse cardiac events. Results: The mean age of those in group 1 was 39.8 ± 5.5 years while those in group 2 was 55.3 ± 7.1 years (p