The Association between Severity of Diastolic Dysfunction and Atrial Fibrillation Following Coronary Artery Bypass Graft

Background and Atrial fibrillation (AF) is a major cause of mortality and morbidity in patients after coronary artery bypass graft (CABG). Attempt for knowing indices and factor influence post CABG AF may help in finding patients at risk and prevent more complications. This study aimed to evaluate the association between diastolic dysfunction indices and grading with post CABG AF during hospitalization. We studied 120 patients including 61 men and 59 women with sinus rhythm between November 2012 to January 2013. Before CABG, they were examined by conventional echocardiography and tissue Doppler study and were monitored after surgery before being discharged. Statistically significant relationship was found between post CABG AF, DM, HTN, smoking, and use of ACEI and ARB before surgery. In Doppler tissue study a significant association was detected between LVEF and E´velocity (P<0/05). No significant relationship was observed between post CABG AF and diastolic dysfunction grading, type of surgery (off pump or on pump), number of grafts, admission days, and LA volume in conventional echocardiography (P>0/05). Based on our findings DM, HTN, smoking, LVEF, E´ velocity, ACEI and ARB usage, were independent factors related to the occurrence of AF after CABGs. Using both echocardiography and clinical data could be helpful for risk stratification of occurrence of post CABG AF.