Spontaneous automaticity arising from a successfully ablated Mahaim fiber.
J Interv Card Electrophysiol
; 20(1-2): 25-8, 2007 Nov.
Article
em En
| MEDLINE
| ID: mdl-17943429
ABSTRACT
The authors describe a 22-year-old woman with regular and irregular arrhythmias exhibiting left bundle branch block (LBBB) morphology at various heart rates. An atriofascicular fiber was diagnosed as the underlying mechanism for the antidromic reciprocating tachycardia. In addition, spontaneous automaticity of the Mahaim fiber was present during electrophysiologic study. The accessory pathway was ablated successfully, targeting a Mahaim potential at the supero-anterior tricuspid valve annulus. Relatively slow automatic rhythms with identical LBBB morphology were recorded immediately after ablation, as well as during long-term follow-up in a more sporadic and subclinical form. Abnormal automaticity arising from the distal portions of the remnant pathway was considered to be the origin of the slow ventricular rhythms in this peculiar case.
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Base de dados:
MEDLINE
Assunto principal:
Relógios Biológicos
/
Pré-Excitação Tipo Mahaim
/
Ablação por Cateter
/
Sistema de Condução Cardíaco
/
Cardiopatias Congênitas
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
/
Female
/
Humans
Idioma:
En
Revista:
J Interv Card Electrophysiol
Assunto da revista:
CARDIOLOGIA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Áustria