Paroxysmal supraventricular tachycardia is treated with radiofrequency ablation recently. This procedure is performed by ablating slow pathway or accessory pathway using radiofrequency ablation catheter. Recently developed mirofidelity (MIFI) catheter has mini-electrodes that can record local eletrogram with higher resolution. We aimed to investigate the efficacy of MIFI catheter in the ablation of paroxysmal supraventricular tachycardia compared to conventional radiofrequency ablation catheter. Enrolled patients undergo conventional electrophysiologic study. Patients with sustained supraventricular tachycardia during the study are randomized to either study group or control group. Radiofrequency ablation is performed using MIFI catheter in the study group, and conventional catheter (Blazer II) in the control group. The study endpoints are recorded immediately after ablation and there is no additional follow up or management after procedure.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
136
Patients are randomized into the MIFI group and control group. Radiofrequency ablation will target slow pathway for AVNRT or accessory pathway for AVRT. Microfidelity (MIFI) catheter equipped with mini-electrodes will be used for ablation in the MIFI group.
Patients are randomized into the MIFI group and control group. Radiofrequency ablation will target slow pathway for AVNRT or accessory pathway for AVRT. Blazer II radiofrequency ablation catheter will be used for ablation in the control group.
Seoul St Mary's Hospital
Seoul, Seo Ch-gu, South Korea
RF time (seconds) to successful ablation
For AVNRT, the time (seconds) from the beginning of radiofrequency ablation to the emergence of junctional rhythm For AVRT, the time (seconds) from the beginning of radiofrequency ablation to the accessory pathway block
Time frame: At the end of radiofrequency ablation procedure
RF application number
Number of radiofrequency ablation attempt to successful ablation
Time frame: At the end of radiofrequency ablation procedure
Total ablation time (seconds)
Total time of radiofrequency energy delivery
Time frame: At the end of radiofrequency ablation procedure
Presence of either acute reconnection or reinduction
Acute accessory pathway reconnection or supraventricular tachycardia reinduction after ablation
Time frame: At the end of radiofrequency ablation procedure
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