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Power Versus Temperature-Controlled Ablation of Supraventricular Tachycardia

Department of Cardiology National Heart Centre Singapore, Republic of Singapore
For reprint information contact: Tan Ru San, MBBS Tel: 65 436 7546 Fax: 65 227 3562 email: tan_ru_san{at}nhc.com.sg Department of Cardiology, National Heart Centre, 17 Third Hospital Avenue, Mistri Wing, Singapore 168752, Republic of Singapore.

Temperature-controlled radiofrequency catheter ablation was prospectively compared with the power-controlled technique in 53 patients with atrioventricular reciprocating tachycardia or atrioventricular nodal reentrant tachycardia. Patients were randomly assigned to either power-controlled (n = 26) or temperature-controlled (n = 27) ablation after electrophysiologic studies. The groups were comparable in terms of mean age (40 ± 16 versus 44 ± 15 years, p = 0.60), sex (54% versus 52% males, p = 0.88), and type of tachycardia (38% versus 52% atrioventricular reciprocating tachycardia, p = 0.91). Successful ablation was achieved in all patients, and the number of radiofrequency applications required were similar. There were no significant differences between groups in mean fluoroscopy time for initial success (2.1 ± 2.3 minutes versus 1.5 ± 1.2 minutes, p = 0.21), for ablative plus booster doses (6.9 ± 4.7 minutes versus 6.0 ± 3.5 minutes, p = 0.42), or for the entire procedure (13.1 ± 6.9 minutes versus 11.6 ± 4.5 minutes, p = 0.35). It was concluded that power-controlled and temperature-controlled methods of radiofrequency ablation were equally efficacious.