Background: Several clinical trials have shown inconsistent results regarding the effect of electrode positions on the success of electrical cardioversion.
Aims: The aim of this meta-analysis was to investigate the effect of the anterior-posterior electrode position on the success of electrical cardioversion in patients undergoing external electrical cardioversion for atrial fibrillation.
Methods: Pubmed, EMBASE, the Cochrane Library and the Chinese National Knowledge Infrastructure were searched for randomized controlled trials. The effect of the anterior-posterior electrode position on cardioversion success is presented as a risk ratio with 95% confidence interval.
Results: Ten trials with 1281 patients were included in the analysis. The anterior-posterior electrode position had no advantages in terms of success of electrical cardioversion for atrial fibrillation compared with the anterior-lateral electrode position (risk ratio 1.02, 95% confidence interval 0.96-1.09; P=0.50). Subgroup analysis showed that patients with a left atrium diameter≤45 mm and lone atrial fibrillation might derive benefits from the anterior-posterior electrode position in terms of success of cardioversion. No evidence of publication bias was detected.
Conclusions: The present analysis suggests that only patients with a left atrium diameter≤45 mm and lone atrial fibrillation might derive benefits from the anterior-posterior electrode position compared with the anterior-lateral electrode position during external electrical cardioversion for atrial fibrillation. However, there was insufficient evidence to support any advantages for the anterior-posterior electrode position in other situations.
Keywords: Atrial fibrillation; Cardioversion électrique; Electrical cardioversion; Electrode position; Fibrillation atriale; Meta-analysis; Méta-analyse; Position de l’électrode.
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