Key result
Catheter ablation successfully treats typical AVNRT presenting with common-pathway-mediated 2:1 AV block.
Why the study?
The mechanism of 2:1 atrioventricular conduction block during typical atrioventricular nodal reentrant tachycardia (AVNRT) remains unclear and requires elucidation.
Population
A 66-year-old woman with frequent PVCs and wide QRS complex tachycardia
Comparison
Electrophysiological testing and catheter ablation with analysis of conduction block mechanisms
Design
Case report with detailed electrophysiological study
Authors
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May inform post-PVC ablation induction protocols in select patients; leaves open mechanism and generalizability.
Case Report (n=1)
This case demonstrates that the involvement of the upper and lower common pathways during typical AVNRT can induce 2:1 AV conduction block at different anatomical levels.
Akrawinthawong et al. (2019) conducted a case report in Atrioventricular nodal reentrant tachycardia with 2:1 conduction block (n=1). Electrophysiological testing and catheter ablation was evaluated on Mechanism of 2:1 AV conduction block during typical AVNRT. Electrophysiological testing revealed that the involvement of the upper and lower common pathways during typical AVNRT induced 2:1 AV conduction block, which was successfully ablated.
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