Narrow QRS Tachycardia: What Is the Mechanism?

A 45-year-old man was referred for radiofrequency catheter ablation of narrow QRS tachycardia that terminated with intravenous adenosine. A 12-lead electrocardiogram showed no baseline pre-excitation. The echocardiogram was essentially normal. The electrophysiological study showed a normal atrial–Hi...

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Detalles Bibliográficos
Autores principales: Mohanan Nair, Krishna Kumar, Namboodiri, Narayanan, Valaparambil, Ajitkumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MediaSphere Medical 2021
Materias:
Case Report
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8384300/
https://www.ncbi.nlm.nih.gov/pubmed/34476117
http://dx.doi.org/10.19102/icrm.2021.120803
Descripción
Sumario:A 45-year-old man was referred for radiofrequency catheter ablation of narrow QRS tachycardia that terminated with intravenous adenosine. A 12-lead electrocardiogram showed no baseline pre-excitation. The echocardiogram was essentially normal. The electrophysiological study showed a normal atrial–His interval of 110 ms and a His–ventricular interval of 44 ms during sinus rhythm. An anterograde study demonstrated no dual atrioventricular nodal physiology. Atrial pacing protocols easily and reproducibly induced a narrow QRS tachycardia. What is the mechanism of the tachycardia?

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