Gender differences in immediate outcomes of patients with acute non-ST-elevation myocardial infarction undergoing off-pump coronary artery bypass grafting

Abstract

Aim.To determine gender differences in immediate outcomes of patients with acute non-ST-elevation myocardial infarction undergoing off-pump coronary artery bypass grafting (CABG).Methods.CABG was indicated to patients with persistent myocardial ischemia (postinfarction angina) who did not meet criteria for percutaneous coronary intervention. Hybrid procedures and CABG aimed at repairing mechanical complications of AMI were not considered. Men (n = 66, 65.3%) were assigned to Group 1, whereas women (n = 35, 34.7%) were assigned to Group 2. Women were older and obese (grades 2-3), had higher GRACE scores, levels of cardiospecific troponin and higher rate of type 2 diabetes (p<0.05). Men and women commonly had three-vessel CAD (3.0; 4.0). The mean SYNTAX score for men and women was 29.0 (24.0; 33.0) and 27.0 (24.0; 28.0), p>0.05.Results.The median preoperative period was 4.0 days (3.8; 5.0) in male patients and 5.0 (4.0; 6.0) days in female patients (p>0.05). The groups did not have any significant differences in technical aspects of CABG (p>0.05). Mortality was 3.0% in men and 2.9% in women (p>0.05). No deaths were recorded from the onset of AMI till the first 72 hours after CABG. Three patients who under CABG died after 72 hours from the onset of MI (p>0.05). The total number of complications was 13 (19.7%) in men and 5 (14.3%) in women (p>0.05). There were no cases of conversion to cardiopulmonary bypass.Conclusion.The immediate outcomes of delayed of-pump CABG in both, men and women with acute non-ST-segment myocardial infarction, were comparable in mortality and complications (p>0.05). The immediate outcomes of CABG performed within 72 hours in both, men and women, were comparable in mortality as compared to surgeries performed after 72 hours from the MI onset. Obtained data demonstrated safety of early open-heart surgeries for acute non-ST-elevation myocardial infarction.