Block of the Mitral-pulmonary Isthmus During Ablation of a Single Left-sided Accessory Pathway Causing Different Patterns of Retrograde Atrial Activation

The case of a 16-year-old patient with atrioventricular tachycardia caused by a single left anterolateral accessory pathway is reported. When the patient underwent radiofrequency ablation, a lesion on the mitral annulus lateral wall produced changes in the retrograde atrial activation pattern determ...

Full description

Saved in:
Bibliographic Details
Published in:Arquivos brasileiros de cardiologia 2002-05, Vol.78 (5), p.504-509
Main Authors: Vasconcelos, José Tarcísio Medeiros de, Costa, Eduardo Rodrigues Bento, Galvão Filho, Silas dos Santos, Barcellos, Cecília Monteiro Boya, Maldonado, Jaime Giovany Arnez
Format: Article
Language:English
Subjects:
CARDIAC & CARDIOVASCULAR SYSTEMS
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The case of a 16-year-old patient with atrioventricular tachycardia caused by a single left anterolateral accessory pathway is reported. When the patient underwent radiofrequency ablation, a lesion on the mitral annulus lateral wall produced changes in the retrograde atrial activation pattern determined by that pathway; changes ranged from a delay in depolarization of the annulus posterior portions to full left atrium counterclockwise activation. Such phenomena were probably caused by a block in the isthmus between the annulus and the lower left pulmonary vein ostium. This case illustrates the importance of the mitral-pulmonary isthmus in the process of left atrium activation, an alert to changes induced by its unintentional block during accessory pathway ablation.
ISSN:0066-782X
1678-4170
1678-4170
DOI:10.1590/S0066-782X2002000500007