Key result
Elective cardioversion for atrial fibrillation was ineffective in 42.6% of cases, with female gender, young age, high ventricular rate, antiarrhythmic use, and low eGFR predicting failure.
Cohort (n=1,342)
Yes
In a large real-world cohort, female gender, younger age, higher ventricular rate, antiarrhythmic use, and renal failure were identified as independent predictors of ineffective elective cardioversion for atrial fibrillation.
Answers are grounded in this paper and cite their sources.
These predictors should not yet guide cardioversion decisions; leaves open need for prospective validation in AF.
BACKGROUND: Elective cardioversion (ECV) of atrial fibrillation (AF) is a standard procedure to restore sinus rhythm. However, predictors for ineffective ECV (failure of ECV or recurrence of AF within 30 days) are unknown. METHODS: We investigated 1998 ECVs performed for AF lasting >48 h in 1,342 patients in a retrospective multi-center study. Follow-up data were collected from 30 days after ECV. RESULTS: Median number of cardioversions was one per patient with a range of 1-10. Altogether 303/1998 (15.2%) ECVs failed. Long (>5 years) AF history and over 30 days duration of the index AF episode were independent predictors for ECV failure and low (<60/min) ventricular rate of AF predicted success of ECV. In patients with successful ECVs an early recurrence of AF was detected in 549 (32.4%) cases. Female gender, high (>60/min) ventricular rate, renal failure and antiarrhythmic agents at discharge were the independent predictors for recurrence. In total ECV was ineffective in 852 (42.6%) cases. Female gender (OR 1.44, CI95% 1.15-1.80, p < 0.01), young (<65 years) age (OR 1.31, CI95% 1.07-1.62, p = 0.01), ventricular rate >60/min (OR 1.92, CI95% 1.08-3.41, p = 0.03), antiarrhythmic medication at discharge (OR 1.48, CI95% 1.14-1.93, p < 0.01) and low (<60/ml/min) estimated glomerular filtration rate (OR 1.59, CI95% 1.08-2.33, p = 0.02) were predictors of ineffective ECV. CONCLUSIONS: Female gender, use of antiarrhythmic drug therapy and renal failure predicted both recurrence of AF and the composite end point. For the first time in a large real-life study several clinical predictors for clinically ineffective ECV were identified.
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Hellman et al. (2017) conducted a cohort in Atrial fibrillation (n=1,342). Elective cardioversion was evaluated on Ineffective elective cardioversion (composite of unsuccessful ECV or recurrence of AF within 30 days). Elective cardioversion for atrial fibrillation was ineffective in 42.6% of cases, with female gender, young age, high ventricular rate, antiarrhythmic use, and low eGFR predicting failure.
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