Block of the Mitral-pulmonary Isthmus During Ablation of a Single Left-sided Accessory Pathway Causing Different Patterns of Retrograde Atrial Activation
| Autor: | Vasconcelos José Tarcísio Medeiros de, Costa Eduardo Rodrigues Bento, Galvão Filho Silas dos Santos, Barcellos Cecília Monteiro Boya, Maldonado Jaime Giovany Arnez |
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| Jazyk: | English<br />Portuguese |
| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Arquivos Brasileiros de Cardiologia, Vol 78, Iss 5, Pp 504-509 (2002) |
| Druh dokumentu: | article |
| ISSN: | 0066-782X 1678-4170 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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