Successful catheter ablation in a patient with polymorphic ventricular tachycardia.
We describe a patient with polymorphic ventricular tachycardia (PVT)/ventricular fibrillation (VF) without organic heart disease who was cured by radiofrequency catheter ablation. The patient was a 65-year-old woman with a 10-year history of recurrent syncope. There was no evidence of organic heart disease, and the QT interval during sinus rhythm was borderline normal (corrected QT interval = 0.45 sec1/2). ECG recording during syncope showed PVT. On one occasion, PVT degenerated into VF. This PVT was always induced by a premature ventricular complex (PVC) originating from the right ventricular (RV) outflow tract. Rapid pacing (220 beats/min) at the site of PVC origin reproduced polymorphic change of the QRS wave on surface ECG that was similar to PVT. This suggests that the PVT originated from a single focus in the RV outflow tract. Catheter ablation was performed at the site of PVC origin. During 18-month follow-up, PVT/VF was not documented.
Kusano
K F
KF
Department of Cardiovascular Medicine, Okayama University Medical School, Japan. kfuku@cc.okayama-u.ac.jp
Yamamoto
M
M
Emori
T
T
Morita
H
H
Ohe
T
T
D000368:Aged; D017115:Catheter Ablation; D004562:Electrocardiography; D005260:Female; D006801:Humans; D017180:Tachycardia, Ventricular / Q000503:physiopathology* / Q000601:surgery*