Radiofrequency ablation of sustained ventricular tachycardia related to the mitral isthmus in Chagas' disease.
This case report describes the electrophysiological findings of a 62-year-old patient with chronic Chagas' disease and two distinct morphologies of sustained ventricular tachycardia that involved a mitral isthmus. Multiple RF applications were necessary to obtain a bidirectional conduction block in the mitral isthmus that was related to the interruption of both tachycardias. After the procedure, the patient presented massive cerebral infarction that progressed to coma and death. Autopsy showed acute and old lesions at the mitral isthmus and recent mitral annulus thrombosis.
Scanavacca
Mauricio
M
Heart Institute (InCor) University of São Paulo, São Paulo, Brazil. arrscan;vaincor.usp.br
Sosa
Eduardo
E
d'Avila
André
A
De Lourdes Higuchi
Maria
M
D017115:Catheter Ablation / Q000379:methods*; D002598:Chagas Cardiomyopathy / Q000150:complications*; D002908:Chronic Disease; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D017809:Fatal Outcome; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D008943:Mitral Valve / Q000473:pathology / Q000503:physiopathology*; D012008:Recurrence; D017180:Tachycardia, Ventricular / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*