Tehran University of Medical Sciences The Research in Heart Yield and Translational Medicine (RHYTHM) 3115-7270 4 2 2009 04 16 97 102 Hakimeh Sadeghian Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Mehrdad Sheikhvatan Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Mehran Mahmoodian Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Mahmood Sheikhfathollahi Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Elham Hakki Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Afsaneh Sadeghian Shahrood University of Medical Sciences, Shahrood, Iran. Behnaz Behnam Fatemieh Hospital, Semnan University of Medical Sciences, Semnan, Iran. Ali Mohammad Haji Zeinali Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Vahid Semnani Fatemieh Hospital, Semnan University of Medical Sciences, Semnan, Iran. 2015 10 03 Background: Studies on the prognosis of ST elevation myocardial infarction (STEMI) versus non-ST elevation myocardial infarction (non-STEMI) have shown different results. The present study was designed to compare the early outcome and left ventricular systolic function of patients with ST and non-ST elevation myocardial infarction. Methods: The patients' information was derived from 10,065 consecutive patients hospitalized in Tehran Heart Center with acute MI (2007 patients with STEMI and 8058 with non-STEMI). The baseline clinical characteristics, post-MI complications, left ventricular systolic functions, and 30-day mortality rates were compared. Results: A history of current cigarette smoking, opium addiction, and brain stroke was more frequent in the STEMI patients, whereas hyperlipidemia, hypertension, and obesity were found more in the non-STEMI group. Ejection fraction was higher in the non-STEMI patients than that in the STEMI group, and anterior wall infarction was detected more frequently in the STEMI cases. A history of coronary artery bypass grafting and also percutaneous coronary intervention was observed more in the non-STEMI group. Amongst the in-hospital complications, ventricular arrhythmias (1.4 vs. 0.5, P<0.001) and pulmonary edema (0.4 vs. 0.1, P=0.002) were more prevalent in the STEMI cases. The 30-day mortality rate in the STEMI group was higher than that in the non-STEMI group (5.5 vs. 2.4, P<0.001). Early mortality in both groups was dependant on advanced age, diabetes mellitus, post-MI bradycardia, and atrioventricular block. Also, female gender and pulmonary edema in the STEMI group and family history of MI in the non-STEMI patients could predict 30-day mortality.   Conclusion: There were several differences in the baseline characteristics and early outcome between the two types of STEMI and non-STEMI. The 30-day mortality rate was higher in the STEMI group than that in the non-STEMI group. https://rhythm.tums.ac.ir/index.php/jthc/article/view/126 https://rhythm.tums.ac.ir/index.php/jthc/article/download/126/124