Publication date: Available online 18 December 2017
Source:The Journal of Emergency Medicine
Author(s): Gerard C. Markey, Nigel Salter, John Ryan
BackgroundAtrial fibrillation (AF) is the most commonly encountered dysrhythmia in the emergency department, and its prevalence is increasing. A substantial proportion of these patients have recent-onset AF (<48 h). The poor prognosis associated with AF is being increasingly recognized, and there is some evidence for better outcomes in younger patients with recent-onset AF when sinus rhythm is restored. Flecainide is recommended in the latest international guidelines for cardioversion of recent-onset AF, but its safety and efficacy relative to other recommended agents are unclear.ObjectiveOur aim was to clarify the Level 1 evidence for the use of i.v. flecainide in acute AF.MethodsWe performed a systematic review and meta-analysis of the literature. Medline, Ovid, Embase, and Cochrane Central databases were searched for relevant studies. Only randomized controlled trials (RCTs) of i.v. flecainide for acute conversion of recent-onset AF were selected for meta-analysis.ResultsFour hundred and three studies were screened, of which 11 RCTs were eligible for meta-analysis. Flecainide had high efficacy for cardioversion within 2 h (number needed to treat [NNT] = 1.8). Efficacy was superior to propafenone, amiodarone, procainamide, ibutilide, and sotalol (NNT = 4.3). There was no statistically significant difference in pro-dysrhythmia compared to these anti-dysrhythmics or placebo.ConclusionsIntravenous flecainide cardioversion could be a safe and effective option for emergency physicians to restore sinus rhythm in selected patients with acute AF.
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