Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 48 3 2010 06 15 164 167 EN Jamshid Bagheri Department of Cardiovascular Surgery, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran. Fereshteh Rezakhanloo Cardiac Transplantation and Surgery Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran. 2015 09 28 Although systolic dysfunction is revealed as a prognostic factor in cardiac surgery , the role of diastolic dysfunction as a predictive factor is less evaluated. In this retrospective study from 872 patients that underwent isolated coronary artery bypass graft(Jan 2008-Feb 2009),388 patients had normal left ventricular ejection fraction (>50%). These are divided in two groups, Group 1: 361 patients without diastolic dysfunction (impaired relaxation) and Group 2: 27 patients with diastolic dysfunction ( impaired relaxation) . Mean age in group 1 was 57.72 year and in group 2 was 61.16 year (P =0.07). Risk factors such as diabetes mellitus, hypertention and dyslipidemia were similar. Although overall complication rate was higher in group 2( 11.1% vs 2.8% P value 0.05),but when each complication was studied individually no significant statistical difference was found. Also no significant statistical difference was found in mortality (2.2% in group 1 vs 7.4% in group 2 P =0.1). In conclusion, from clinical standpoint diastolic dysfunction can be an important factor in assessing surgical outcome in patients whom underwent coronary artery bypass grafting. https://acta.tums.ac.ir/index.php/acta/article/view/3671 https://acta.tums.ac.ir/index.php/acta/article/download/3671/3646