Wide and narrow QRS tachycardias: What is the mechanism?

A 50-year-old lady was referred for radiofrequency catheter ablation of narrow QRS tachycardia that was terminated with intravenous adenosine. Twelve-lead Electrocardiogram (ECG) was normal during sinus rhythm. The electrophysiological study showed an Atrio-Hisian (AH) interval of 104 ms and Hisio-V...

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Autores principales: Nair, Krishna Kumar Mohanan, Namboodiri, Narayanan, Valaparambil, Ajitkumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Short Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7296255/
https://www.ncbi.nlm.nih.gov/pubmed/32534689
http://dx.doi.org/10.1016/j.ihj.2020.03.012
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author Nair, Krishna Kumar Mohanan
Namboodiri, Narayanan
Valaparambil, Ajitkumar
author_facet Nair, Krishna Kumar Mohanan
Namboodiri, Narayanan
Valaparambil, Ajitkumar
author_sort Nair, Krishna Kumar Mohanan
collection PubMed
description A 50-year-old lady was referred for radiofrequency catheter ablation of narrow QRS tachycardia that was terminated with intravenous adenosine. Twelve-lead Electrocardiogram (ECG) was normal during sinus rhythm. The electrophysiological study showed an Atrio-Hisian (AH) interval of 104 ms and Hisio-Ventricular (HV) interval of 45 ms during sinus rhythm. Atrial pacing reproducibly induced regular broad (left bundle branch block morphology) and narrow QRS tachycardias. A spontaneous premature ventricular ectopic from right ventricular apex has resulted in transition of the tachycardia from wide to narrow. What are the likely mechanisms?
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spelling pubmed-72962552020-09-15 Wide and narrow QRS tachycardias: What is the mechanism? Nair, Krishna Kumar Mohanan Namboodiri, Narayanan Valaparambil, Ajitkumar Indian Heart J Short Communication A 50-year-old lady was referred for radiofrequency catheter ablation of narrow QRS tachycardia that was terminated with intravenous adenosine. Twelve-lead Electrocardiogram (ECG) was normal during sinus rhythm. The electrophysiological study showed an Atrio-Hisian (AH) interval of 104 ms and Hisio-Ventricular (HV) interval of 45 ms during sinus rhythm. Atrial pacing reproducibly induced regular broad (left bundle branch block morphology) and narrow QRS tachycardias. A spontaneous premature ventricular ectopic from right ventricular apex has resulted in transition of the tachycardia from wide to narrow. What are the likely mechanisms? Elsevier 2020 2020-04-06 /pmc/articles/PMC7296255/ /pubmed/32534689 http://dx.doi.org/10.1016/j.ihj.2020.03.012 Text en © 2020 Cardiological Society of India. Published by Elsevier B.V. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Short Communication
Nair, Krishna Kumar Mohanan
Namboodiri, Narayanan
Valaparambil, Ajitkumar
Wide and narrow QRS tachycardias: What is the mechanism?
title Wide and narrow QRS tachycardias: What is the mechanism?
title_full Wide and narrow QRS tachycardias: What is the mechanism?
title_fullStr Wide and narrow QRS tachycardias: What is the mechanism?
title_full_unstemmed Wide and narrow QRS tachycardias: What is the mechanism?
title_short Wide and narrow QRS tachycardias: What is the mechanism?
title_sort wide and narrow qrs tachycardias: what is the mechanism?
topic Short Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7296255/
https://www.ncbi.nlm.nih.gov/pubmed/32534689
http://dx.doi.org/10.1016/j.ihj.2020.03.012
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