Sudden unexpected improvement in the atrioventricular conduction. What is the mechanism?

The 12-lead electrocardiogram (ECG) of a 79-year-old male patient with recurrent pre-syncope showed irregular sinus rhythm with constant PR interval and left bundle branch block (LBBB) with intermittently blocked P waves. The beat following the blocked P wave had a narrower QRS with a shorter PR int...

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Detalles Bibliográficos
Autores principales: Gupta, Anunay, Bhargava, Kartikeya, Bhasin, Dinkar, Agstam, Sourabh, Isser, Hermohander Singh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Case Report
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8263326/
https://www.ncbi.nlm.nih.gov/pubmed/33971284
http://dx.doi.org/10.1016/j.ipej.2021.05.001
Descripción
Sumario:The 12-lead electrocardiogram (ECG) of a 79-year-old male patient with recurrent pre-syncope showed irregular sinus rhythm with constant PR interval and left bundle branch block (LBBB) with intermittently blocked P waves. The beat following the blocked P wave had a narrower QRS with a shorter PR interval. The phenomenon of bilateral bundle branch block explains the sudden improvement in the atrioventricular conduction.

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