NCT03564925

Wide Area Circumferential Ablation With Contact Force Versus Cryoballoon Ablation

Comparison of Wide Area Circumferential Ablation With Cryoballoon Ablation in Patients With Paroxysmal Atrial Fibrillation: A Multi-center, Prospective, Randomized, Controlled Study

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 200 (estimated)
• Sponsor: The Second Affiliated Hospital of Chongqing Medical University · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this randomized clinical trial is to compare the efficacy and safety of wide area circumferential ablation using contact force catheter with cryoballoon ablation for the treatment of paroxysmal atrial fibrillation.

Detailed description

Atrial fibrillation (AF) is the most common cardiac arrhythmia and is associated with stroke, reductions in quality of life and overall survival. Previous studies have shown that cryoballoon ablation was noninferior to radiofrequency ablation with respect to efficacy for the treatment of patients with drug-refractory paroxysmal atrial fibrillation. However, the pulmonary vein isolation for radiofrequency catheter ablation in previous studies was done around each pulmonary-vein antrum, and it's not wide area circumferential ablation. Moreover, the induction of atrial fibrillation by isoproterenol or programmed stimulation and burst pacing was not performed in most of previous studies. We hypothesize that wide area circumferential ablation with contact force catheter and combined catheter ablation the potential atrial triggers and/or other atrial arrhythmias induced by aggressive induction is more effective than cryoballoon ablation in patients with paroxysmal atrial fibrillation.

Conditions

• Atrial Fibrillation
• CryoAblation
• Pulmonary Vein Isolation

Interventions

Type	Name	Description
PROCEDURE	Wide area circumferential ablation	Wide area circumferential ablation with contact force catheter will be performed in Patients allocated in this group,the induction of atrial fibrillation by isoproterenol or programmed stimulation and burst pacing will be performed. If frequent atrial premature beats are found beyond pulmonary vein, activation mapping will be performed for eliminating the triggers. If atrial tachycardias(ATs)are induced, activation mapping the ATs and ablation will be performed. Electrical isolation of pulmonary veins and elimination the triggers and ATs induced by isoproterenol or programmed stimulation and burst pacing are the endpoints of ablation
PROCEDURE	Cryoballoon ablation	In the cryoballoon procedures, pulmonary vein isolation (PVI) was achieved using fluoroscopic guidance to position the cryoballoon catheter. Once PV-to-balloon occlusion was confirmed by retrograde radiopaque contrast agent retention, circumferential ablation was performed by freezing with a single-shot delivery of coolant to the balloon.

Timeline

• Start date: 2019-06-01
• Primary completion: 2020-10-01
• Completion: 2021-12-30
• First posted: 2018-06-21
• Last updated: 2019-03-19

Locations

1 site across 1 country: China