Single Dose Flecainide for Early Sinus Rhythm Conversion of Perioperative Atrial Fibrillation After Noncardiac Surgery

Exclusion criteria

• ✕. known left ventricular ejection fraction ≤ 40%;
• ✕. myocardial infarction within the last 30 days;
• ✕. QRS interval \>140ms;
• ✕. allergy to flecainide;
• ✕. severe uncorrected hypokalemia (\<2.5 mEq/L) or hyperkalemia (\>6.5 mEq/L) at the time of randomization;
• ✕. severe acute liver dysfunction or history of advanced cirrhosis;
• ✕. severe renal insufficiency (eGFR ≤ 30ml/min or dialysis); OR,
• ✕. second or third degree atrioventricular block within the last 30 days, in the absence of a pacemaker device;