Work

Ablation of AVNRT in a Setting of Slow Pathway–Dominant Conduction

Year: 2025

Type: article

Abstract: BACKGROUND: We report a case of paroxysmal supraventricular tachycardia with slow pathway-dominant conduction and prolonged PR interval in sinus rhythm. CASE SUMMARY: A 33-year-old man presented with persistent palpitations and chest tightness, with narrow QRS tachycardia with a prolonged PR interval on electrocardiogram. After the administration of isoproterenol, the PR interval normalized. During the electrophysiology study, atrioventricular node conduction jumping, echoes, and dual ventricular responses were observed. After ablation, the fast pathway function of the atrioventricular node was restored, and electrocardiography revealed a normal PR interval. DISCUSSION: This case demonstrates that slow pathway-dominant atrioventricular nodal re-entrant tachycardia can be successfully treated by slow pathway ablation, while ensuring normal fast pathway function is key to avoiding atrioventricular block. TAKE-HOME MESSAGE: Slow pathway ablation effectively treats this arrhythmia, and the preservation of fast pathway function is crucial to avoid atrioventricular block.

Source: JACC Case Reports

DOI: 10.1016/j.jaccas.2025.106059

Authors: Liuguang Song, Simin Cai, Jian Ye, Yaping Wang

Institutions: Second Affiliated Hospital of Zhejiang University, Zhejiang University

Language: English

Topic: Cardiac Arrhythmias and Treatments

Subfield: Cardiology and Cardiovascular Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $850