comparison of short-term clinical outcome of non-st elevation versus st elevation myocardial infarction

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.