Key result
Extensive right atrial ablation for persistent atrial fibrillation carries a risk of atrium-atrioventricular node conduction block, particularly in patients with prior cardiac surgery or scarring.
Why the study?
What are the risk factors and methods of prevention for atrium-atrioventricular node conduction block during catheter ablation of persistent atrial fibrillation?
What are the risk factors and methods of prevention for atrium-atrioventricular node conduction block during catheter ablation of persistent atrial fibrillation?
Extensive bi-atrial ablation for persistent atrial fibrillation can cause atrium-atrioventricular node conduction block, necessitating awareness of risk factors and prevention methods.
Heightens caution during extensive right atrial ablation in scarred atria; leaves open prospective validation of preventive strategies.
Previous studies have suggested that fibrillatory substrates are widely distributed in both atria in patients with persistent atrial fibrillation. Extensive bi-atrial ablation has been increasingly performed to improve the clinical outcomes; however, this may adversely affect the intra-atrial conduction during sinus rhythm. The worst con- sequence of an intra-atrial conduction disturbance is conduction block between the atrium and atrioventricular node. There have been a few case reports on this complication, which suggest that the conduction block may occur more. This review aimed to describe the risk factors and method of prevention of atrium-atrioventric-ular node conduction block.
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Yoshihide Takahashi (2011) conducted a review in Persistent Atrial Fibrillation. Right atrial substrate modification during catheter ablation was evaluated. Extensive right atrial ablation for persistent atrial fibrillation carries a risk of atrium-atrioventricular node conduction block, particularly in patients with prior cardiac surgery or scarring.
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