Research On The Efficiency And Success Rate Of Nonfluoroscopic Ablation Of Ventricular Arrhythmia Using EnSite-NavX^TM

【Objective】To investigate the efficiency and success rate between ventricular arrhythmia（premature ventricular contractions and ventricular tachycardia） using En Site-Nav X^TM system or using the traditional X-ray way.【Methods】 Four hundred patients with ventricular arrhythmias（including monomorphic premature ventricular contractions and monomorphic ventricular tachycardia） received radiofrequency catheter ablation were divided into nonfluoroscopic group and fluoroscopic group. Nonfluoroscopic group performed the procedure using En Site-Nav X^TM mapping system without fluoroscopy. Fluoroscopic group performed the procedure using conventional X-ray with or without Nav X^TM mapping system /Carto 3 mapping system.【Results】Ninety-fore patients with premature ventricular contractions in Nav X^TM mapping group, two hundred and twenty patients with premature ventricular contractions in fluoroscopic group. Forty-one patients with ventricular tachycardia in Nav X^TM mapping group, forty-five patients with ventricular tachycardia in fluoroscopic group. There was no significant difference between the Nav X^TM mapping group and fluoroscopic group for procedure time（77.4±23.6 vs. 79.5±41.5）, the rate of procedure success（88.1% vs. 89.1%）, arrhythmia recurrence（1.5% vs. 2.3%） or severe complications（1.5% vs. 1.9%）. 127 patients（94.1%） was successful performed ablation with a completely nonfluoroscopic approach in 135 patients.【Conclusion】 Non-fluoroscopic RFCA approach of ventricular arrhythmia using the En Site-Nav X^TM mapping system to navigate catheter is safe and effective, which also protects staffs and patient from ionization radiation hazard.