[Radiofrequency ablation of idiopathic right ventricular tachycardia].
OBJECTIVE
To study the effect of electrophysiological characterization and radiofrequency ablation on idiopathic right ventricular tachycardia.


METHODS
Five patients ( 3 male and 2 female ) with an average age of 35.2+/-11.2 years were enrolled in this study. 7F EPT electrode in temperature-controlled mode was used for the ablation. The temperature and power were controlled within the range of 50-55 degrees Celsius; and 30-35 W respectively. The ablation target was the point that evidently induced P-potential at posterior right ventricular septum by scaling test. Tachycardia was stopped within 3 s. Consolidated discharge was within 40 s. The ablation was ended when the tachycardia could not be evoked during routine intracardiac electrophysiology test. Aspirin (0.1 g/d) was given orally for 1 month after operation.


RESULTS
The body surface electrocardiogram did not change significantly after ablation. Neither S1S1 and program med stimulation, nor intravenous drip of isoproterenol after operation evoked tachycardia. Neither tachycardia nor complication appeared 4-6 months after the test.


CONCLUSIONS
(1) Posterior right interventricular septum can also give rise to idiopathic ventricular tachycardia similar to left posterior interventricular septum. Ablation at the point where P-potential can be evidently induced by scaling test could easily acquire success. (2) Idiopathic right ventricular tachycardia has typical body surface electrocardiogram when tachycardia attacks. (3) Ventricular tachycardia is different from bundle branch reciprocal ventricular tachycardia.
Zhong
Zhi-xiong
ZX
Department of Cardiology, People's Hospital of Meizhou, Meizhou 514031, China. dr.zhongzx@tom.com
Li
Cun-ren
CR
Ye
Zhuo-lian
ZL
Zhang
Peng-fei
PF
Liu
Tian-huang
TH
Yang
Ping-zhen
PZ
D000293:Adolescent; D000328:Adult; D017115:Catheter Ablation; D002648:Child; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017180:Tachycardia, Ventricular / Q000503:physiopathology / Q000601:surgery*