AI Article Synopsis
- A study investigated the prevalence and predictors of complete atrioventricular block (C-AVB) that can occur after internal electrical cardioversion (IEC) during atrial fibrillation (AF) ablation.
- Of 124 patients undergoing the procedure, 88% had their AF terminated, and transient C-AVB occurred in 13% of those where AF was terminated, with longer ventricular pauses observed in those with C-AVB.
- Key predictors for experiencing transient C-AVB included a larger left atrial diameter and preexisting intraventricular conduction abnormalities.
Article Abstract
Background: Complete atrioventricular block (C-AVB) following internal electrical cardioversion (IEC) during atrial fibrillation (AF) ablation has not been fully investigated. We aimed to determine the prevalence and predictors of C-AVB following IEC during AF ablation.
Methods: C-AVB (non-conducted sinus impulse after IEC) and ventricular pause (VP) (the interval between IEC and the QRS complex) following the first attempt of IEC, and baseline electrocardiographic parameters were investigated in patients who underwent first-time AF ablation.
Results: We investigated the first attempt of IEC in 124 patients (mean age:70 ± 11 years, 81 men, 99 non-paroxysmal AF). AF was terminated in 109/124 (88%) patients, with a VP of 1590 [1014-2208] (maximum, 8780) ms. Transient C-AVB following IEC occurred in 14/109 (13%) patients. The VP was longer in patients with transient C-AVB than in those without transient C-AVB (2418 [1693-4425] vs. 1530 [876-2083] ms, p = 0.002). In multivariate analysis, the left atrial diameter (Odds ratio [OR]:1.21; 95% confidence interval (95%CI):1.06-1.39; p = 0.005) and preexisting intraventricular conduction abnormality (OR:9.22; 95%CI:1.60-53.3; p = 0.013) were predictors of transient C-AVB following IEC.
Conclusion: Left atrial diameter and preexisting intraventricular conduction abnormalities were predictors of transient C-AVB following IEC during AF ablation.
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| http://dx.doi.org/10.1016/j.jelectrocard.2023.12.005 | DOI Listing |
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Complete atrioventricular block following internal electrical cardioversion during atrial fibrillation ablation.
J Electrocardiol
January 2024
Department of Cardiology, Central Japan International Medical Center, Minokamo, Gifu, Japan; Department of Cardiology, Graduate School of Medicine, Gifu University, Gifu, Japan; Department of Molecular Pathophysiology, Shinshu University Graduate School of Medicine, Matsumoto, Nagano 390-8621, Japan.
Article Synopsis
- A study investigated the prevalence and predictors of complete atrioventricular block (C-AVB) that can occur after internal electrical cardioversion (IEC) during atrial fibrillation (AF) ablation.
- Of 124 patients undergoing the procedure, 88% had their AF terminated, and transient C-AVB occurred in 13% of those where AF was terminated, with longer ventricular pauses observed in those with C-AVB.
- Key predictors for experiencing transient C-AVB included a larger left atrial diameter and preexisting intraventricular conduction abnormalities.
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