Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-24 @ 7:02 PM
Ignite Modification Date:
2025-12-24 @ 7:02 PM
NCT ID:
NCT04379557
Brief Summary:
The investigators will compare the ablation time during pulmonary vein isolation of Ablation Index-guided high power ablation with those with conventional ablation.
Ablation time of conventional group will be used from OPTIMUM study. For secondary outcomes, acute outcomes of pulmonary vein isolation using two different strategies will be compared. During 1 year of follow-up in both groups, atrial fibrillation recurrence will be evaluated. The atrial fibrillation recurrence rate at 1 year after pulmonary vein isolation will be compared between the two groups. In addition, fluoroscopic time, procedure time, and complication rates for the high power ablation group will be compared with those with conventional power.
Detailed Description:
Ablation Index guided high power ablation will be performed in 70 patients with atrial fibrillation with prospectively and consecutively. A contact force-sensing catheter will be used. Ablation will be performed with point-by-point technique using Visitag automated annotation criteria as below;
Ablation Index(AI) target:
* Anterior/roof : 450 AI
* Anterior near carina area : 500 AI
* Posterior/inferior/carina : 350 AI
* Posterior near carina area : 400 AI
* Area near esophagus :25W, 15sec or 300 AI (no further ablation if esophageal temperature increase more than 39°C)
* Interlesion distance ≤ 4.5mm
VISITAGTM settings
* 2.5mm stability range
* 7 sec stability time
* FOT 25%, 3g force
* Tag size 2mm
Ablation parameters are preset as below;
* RF power range: 40W at anterior/roof, 30W at posterior/inferior, 25W at near esophagus area (decrease power 5W by operator decision)
* Target contact force range: 10-20 g
* Flow rate:
* 8 ml/min for STSF \< 30W
* 15 ml/min for STSF ≥ 30W
Acute reconnection will be analysed according to predefined segments.
Subgroup analysis will be performed according to type of AF. Data of patients with paroxysmal atrial fibrillation and persistent atrial fibrillation will be analysed separately, and investigate whether this new ablation strategy is effective in both group of patients. To compare outcomes with OPITMUM phase 2 study, the proportion of patients with paroxysmal and persistent atrial fibrillation would be 75% and 25%. Therefore, 53 patients with paroxysmal atrial fibrillation and 17 patients with persistent atrial fibrillation will be enrolled in this study.
Study:
NCT04379557
Study Brief:
Protocol Section:
NCT04379557