Work

Dual Atrioventricular Nodal Non-Reentrant Tachycardia

Year: 2026

Type: article

Abstract: BACKGROUND: Dual atrioventricular nodal non-reentrant tachycardia (DAVNNT) is a rare arrhythmia often misdiagnosed as atrial fibrillation, leading to inappropriate management. We present a case of DAVNNT successfully treated with slow pathway ablation. CASE SUMMARY: A 77-year-old woman with palpitations and syncope was initially thought to have sick sinus syndrome, supraventricular ectopic beats, and atrial fibrillation, resulting in pacemaker implantation and anticoagulation. Following device implantation, persistent tachycardia was observed. Electrocardiographic and intracardiac electrogram analysis suggested DAVNNT, which was confirmed by electrophysiology study. Slow pathway ablation resolved the arrhythmia and symptoms, allowing discontinuation of anticoagulation and beta-blocker therapy. DISCUSSION: Careful analysis of electrocardiographic and electrogram data was crucial in identifying DAVNNT, a rare but treatable arrhythmia. This case highlights the importance of considering alternative diagnoses in patients presenting with bradycardia, syncope, and supraventricular arrhythmias.

Source: JACC Case Reports

DOI: 10.1016/j.jaccas.2025.106673

Authors: Kaspar Lindmäe, Tapio Kuusisto

Institution: Seinäjoen Keskussairaala

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