Atrial Fibrillation Clinical Trial
Official title:
Risk of Asymptomatic Cerebral Embolism During Atrial Fibrillation Ablation Using Smart Touch SF Catheter With Ablation Index Guided High-power Short-duration Strategy Versus Smart Touch Catheter With Standard Settings Evaluated by High-resolution Diffusion-weighted Magnetic Resonance Imaging Technique (REDUCE-IT Study)
The purpose of this prospective randomized controlled study is to evaluate the risk of asymptomatic cerebral embolism during catheter ablation of atrial fibrillation (AF) with AI-HPSD strategy versus standard radiofrequency ablation settings, with the diagnosis of asymptomatic cerebral embolism is determined by brain high-resolution diffusion-weighted magnetic resonance imaging technique.
Radiofrequency catheter ablation is increasingly performed in patients with paroxysmal and persistent atrial fibrillation (AF) in recent decade. However, catheter ablation of AF is associated with the occurrence of procedure-related thromboembolic events, especially the risk of asymptomatic cerebral embolism detected by brain high-resolution diffusion-weighted magnetic resonance imaging (hDWI). Meanwhile, ablation index guided high-power short-duration (AI-HPSD) strategy with the advanced SmartTouch SurroundFlow (STSF) catheter is an increasingly used technique for catheter ablation of AF, which is proposed to be associated with relatively wider and superficial lesions, less risk of esophageal injury, and shorter procedure time plus higher rate of first-pass pulmonary vein isolation. Moreover, the advanced STSF catheter in AI-HPSD strategy features with the Surround Flow entire tip irrigation system, which is a wide-spread distribution of the irrigating solution (56 irrigation holes), resulting in homogenous cooling and protection from thrombus formation and reduced incidence of steam pops. Thus, comparing with the standard radiofrequency ablation technique using the SmartTouch (ST) catheter, the AI-HPSD strategy may associate with much lower risk of periprocedural asymptomatic cerebral embolism, with the application of advanced STSF catheter and shorter procedure time. Therefore, this study is designed as a prospective randomized controlled study to evaluate the risk of asymptomatic cerebral embolism during catheter ablation of AF with AI-HPSD strategy versus standard radiofrequency ablation settings, with the diagnosis of asymptomatic cerebral embolism is determined by brain hDWI. ;
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