Radiofrequency catheter ablation of ventricular tachycardia from right ventricular outflow tract.
From January 1996 to May 2002, 61 patients with ventricular tachycardia from right ventricular outflow tract were referred to Siriraj hospital. All patients underwent clinical examination, Doppler echocardiography and electrophysiologic study. Mapping of ventricular tachycardia was performed by activation mapping and pacemapping. There were 44 females and 17 males with an average age of 41.7 +/- 9.9 years. Presenting symptoms were palpitation (95.1%), presyncope (39.3%), and syncope (26.2%). Six patients were found to have underlying cardiac disease. Radiofrequency catheter ablation was successful in 56 patients (91.8%). There were no major complications. Seven patients (12.5%) had recurrent ventricular tachycardia. Five of them were successfully reablated. The authors concluded that radiofrequency ablation is an effective treatment in patients with ventricular tachycardia from right ventricular outflow tract.
Krittayaphong
Rungroj
R
Division of Cardiology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand.
Sriratanasathavorn
Charn
C
Dhumvibhat
Chatkanok
C
Nutakul
Thitima
T
Charernthai
Sansern
S
Kangkagate
Charuwan
C
D000328:Adult; D000368:Aged; D017115:Catheter Ablation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D017180:Tachycardia, Ventricular / Q000209:etiology* / Q000601:surgery*; D014694:Ventricular Outflow Obstruction / Q000150:complications* / Q000601:surgery*