الفهرس 
Predisposing factors for atrial fibrillation in CABG patients
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Abstract
Background: Atrial fibrillation (AF) is a supraventricular tachyarrhythmia characterized by uncoordinated atrial activation with subsequent deterioration of mechanical function. The incidence of AF after CABG surgery varies from 20 to 40%.Although this arrhythmia is usually benign and self-limiting, it may result in hemodynamic instability and increases the risk of congestive heart failure (CHF), longer ICU stays and longer hospital stay, hence increased healthcare costs. Postoperative AF after CABG was associated with greater in-hospital mortality and worse survival at long-term follow-up. Many perioperative factors have been suggested to increase the incidence of postoperative AF after conventional CABG, such as advanced age, hypertension, withdrawal of b-blocker drug, RCA stenosis, associated valvular diseases (ex. MVD), respiratory complications, bleeding, enlarged LA volume, low ejection fraction, and prolonged ventilation time. Prophylactic measures including, pharmacological strategies as early resumption of beta Blockers and early correction of electrolyte imbalance particularly targeting patients at risk can decrease the incidence of POAF, so decreases the financial burden and more importantly decrease postoperative morbidity and mortality