Population
609 consecutive patients with atrioventricular nodal reentrant tachycardia. Group I had 2:1 AV block during…
Comparison
Electrophysiologic study and radiofrequency… vs Patients with AVNRT without 2:1 AV block
Design
Cohort
Authors
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Indicates 2:1 AV block in AVNRT reflects fast reentry rather than distal disease; supports safe ablation but leaves open prospective validation.
Second-degree AV block during AVNRT is likely driven by a fast reentrant circuit rather than impaired distal conduction, and slow pathway ablation remains safe and effective in these patients.
Lee et al. (1997) studied this question.
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