Key result
Higher pre-cardioversion atrial fibrillatory rate is linked to post-cardioversion AF relapse at 1 month.
Why the study?
An index of atrial electrical electrophysiology to predict AF relapse after cardioversion and its variation by arrhythmia duration was not established.
Does pre-cardioversion atrial fibrillatory rate predict atrial fibrillation relapse in patients with persistent AF?
Population
175 consecutive patients with persistent AF referred for cardioversion
Comparison
Higher vs lower atrial fibrillatory rate prior to cardioversion
Design
Observational cohort study
Follow-up
1 month
Authors
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AFR was associated with post-cardioversion AF relapse risk; leaves open differential utility by arrhythmia duration and requires prospective validation.
Observational (n=175)
Does pre-cardioversion atrial fibrillatory rate predict atrial fibrillation relapse in patients with persistent AF?
Absolute Event Rate: 399% vs 363%
p-value: p=<0.0001
A higher pre-cardioversion atrial fibrillatory rate predicts atrial fibrillation relapse at 1 month, particularly in patients with short arrhythmia duration.
Fredrik Holmqvist (2006) conducted an observational in Persistent atrial fibrillation (n=175). Higher atrial fibrillatory rate (AFR) vs. Lower atrial fibrillatory rate was evaluated on Atrial fibrillation relapse at 1 month (p=<0.0001). Higher pre-cardioversion atrial fibrillatory rate predicted atrial fibrillation relapse at 1 month (399±52 fpm in relapsed patients vs 363±63 fpm in those maintaining sinus rhythm; P<0.0001).
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