Bloqueio do istmo mitro-pulmonar durante ablação de uma via acessória ântero-lateral esquerda determinando diferentes padrões de ativação atrial retrógrada / Block of the mitral-pulmonary isthmus during ablation of a single left-sided accessory pathway causing different patterns of retrograde atrial activation
Arq. bras. cardiol
;
78(5): 497-509, May 2002. graf
Article
in Portuguese, English
| LILACS
| ID: lil-314554
ABSTRACT
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
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tachycardia, Atrioventricular Nodal Reentry
/
Catheter Ablation
/
Heart Atria
/
Heart Block
/
Mitral Valve
Limits:
Adolescent
/
Female
/
Humans
Language:
English
/
Portuguese
Journal:
Arq. bras. cardiol
Journal subject:
Cardiology
Year:
2002
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Hospital Beneficência Portuguesa de Säo Paulo/BR
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