ATRIAL FIBRILLATION;

TO DETERMINE THE FREQUENCY AND ITS PREDISPOSING FACTORS IN PATIENTS AFTER CORONARY ARTERY BYPASS GRAFTING.

Abstract

Introduction: Atrial Fibrillation (AF) is one of the most common arrhythmia
after coronary artery bypass grafting (CABG). Many risk factors have been identified for the
development of postoperative AF with varied level of evidence. AF is associated with increased
risk of morbidity and mortality causing prolong hospital stay and utilizing more resources.
Our study was aimed to identify high risk population for developing post-operative AF and
to draw recommendations for its prevention. Objectives: Our objective was to determine the
frequency of Atrial Fibrillation (AF) and its predisposing factors in patients after Coronary Artery
Bypass Grafting (CABG). Setting: The study was conducted at Cardiac Surgery Department /
Faisalabad Institute of Cardiology, Faisalabad. Duration of Study: 15-12-2014 to 14-07-2015.
Study Design: Cross sectional study. Results: The result showed that out of 130 patients
undergoing CABG surgery, 104 (80.3%) male and 26 (19.7%) females, 9(7%) patients suffered
AF in post-operative phase. A significant association was found between postoperative AF and
advanced age (p = 0.011), obesity (p = 0.028), low EF (p = 0.000), and post-operative use
of β-blocker (p = 0.007). Significant difference was found between postoperative AF and days
stayed in hospital (p = 0.000) and magnesium level at first day (p = 0.038). On the other hand
there was no significant relationship found between AF and prolongs cross clamp and bypass
time. Conclusion: Advance age, obesity, congestive heart failure, low ejection fraction and
withdrawal from beta blockers in post-operative period have been identified as a significant risk
factors for the development of post-operative atrial fibrillation.