Abstract
The American Journal of Cardiology MARCH 13e16, 2014 10 IN AND C -OP-231 Preoperative Left Ventricular Global Strain Predicts Postoperative Atrial Fibrillation in Patients Undergoing Coronary By-Pass Surgery. S. Topcu, K. Kalkan, Z. Lazo glu, O. Gulcu, U. Aksu, Z. Avsar, E. Aksakal. Cardiology Department, Ataturk University, Erzurum, Turkey; Department of Medical Education, Ataturk University, Erzurum, Turkey. Introduction: Preoperative left ventricular dysfunction is closely related to postoperative atrial fibrillation (POAF). Left ventricular global strain (LVGS) is more sensitive measurement of left ventricular dysfunction than conventional measurements. However, there is no studywhether left ventricular global strain assessed by speckle tracking echocardiography predicts postoperative atrial fibrillation and in patients undergoing coronary artery by-pass surgery (CABG). Methods: Fifty-one patients with sinus rhythm who undergoing to CABG were enrolled. Preoperative left ventricular four chamber, two chamber and apical long axis longitudinal strain were measured. Left ventricular global strain obtained as average of left ventricular four chamber, two chamber and apical long axis longitudinal strain. POAF was defined as documentation of AF with at least 5 min duration in 96 hours at postoperative period. Results: Postoperative atrial fibrillation occurred 19 of 51 patients (37%). The mean duration of AF was 13.1 8.2 hours and POAF was observed 2.8 1.2 days after the CABG. Patients with POAF had older, larger Left atrial volume, lower left ventricular ejection fraction and left ventricular global strain and higher syntax score. Multiple logistic regression analysis revealed only LVGS (OR:0.92, 95% CI 0.88-0.96, p1⁄40.001) was independent predictor of POAF. The ROC curve analysis revealed that AUC for LVGS in prediction of POAF was 0.787 (0.6800.894). Cut-off value of 12.1 for LVGS had 76% sensitivity and 82% specificity. Conclusion: Pre-operative left ventricular global strain wasindependently predict the postoperative atrial fibrillation in patients undergoing CABG.
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