Atrial Fibrillation Clinical Trial
Official title:
AF Burden and Echo-guided Persistent AF Ablation Strategy Using Either PV Isolation Alone (CLOSE Protocol) or Optimized Compartmentalization of the Left Atrium (Pseudo-maze Technique): the CLOSEMAZE Study
Recent publications suggest that neither empirical nor individualized substrate modification strategies could improve single-procedure efficacy beyond pulmonary vein (PV) isolation for persistent atrial fibrillation (AF). However, persistent AF represent a broad spectrum of the same disease and if PV isolation may be sufficient for some patient with self-terminated AF or with a small left atrium, a more extended substrate ablation may be required for other patients, for which a second procedure for atrial tachycardia (AT) recurrence is then frequently needed. In addition, a lot of progress has recently been made in the field of ablation techniques using contiguous and optimized ablation radiofrequency (RF) lesions and also for AT mapping with promising results using repetitive but discontinuous Holter monitoring. This trial aims at 1. To objectively compare atrial tachyarrhythmia (ATA) burden > 2 months before ablation and after one or two 'CLOSEMAZE'-guided ablation(s) using continuous monitoring and echo data as a guide for the ablation strategy during the first ablation. 2. To assess ATA burden using continuous monitoring up to 3 years after ablation. 3. To identify baseline structural and electrical properties of the atria or procedural characteristics that predict 1-year and 3-year outcome.
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