NCT01229033

Ablating Atrial Tachycardias Occuring During Ablation of Complex Fractionated Electrograms in Persistent AF

Ablating Atrial Tachycardias Occuring During Ablation of Complex Fractionated Electrograms in Persistent AF - ATTAC CFAE Trial

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 186 (estimated)
• Sponsor: Deutsches Herzzentrum Muenchen · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

Catheter ablation has proven to be an effective treatment option in patients suffering from symptomatic persistent atrial fibrillation (AF). Catheter ablation consists of two major steps: (1) Isolation of pulmonary veins to abolish the trigger of atrial fibrillation and (2) modification of left atrial and eventually right atrial substrate by ablation of complex fractionated atrial electrograms (CFAE). CFAE are mainly found at the ostia of the pulmonary veins, around the left atrial appendage, at the mitral annulus and the septum. When ablating CFAE 40-65% of the patients show a regularization of AF to an atrial tachycardia (AT) that can be macro- or micro-reentrant (localized re-entry). Until now the significance of the AT is unclear. In the following study we examine the hypothesis that an ablation of AT occuring during CFAE ablation (group 1) significantly improves outcome defined as freedom of atrial arrhythmia (AF or AT) compared to patients that are cardioverted when AF has regularized to AT (group 2).

Conditions

• Atrial Fibrillation
• Ablation
• Atrial Flutter

Interventions

Type	Name	Description
PROCEDURE	Ablation	Ablation of atrial tachycardia
PROCEDURE	Cardioversion	Cardioversion of atrial tachycardia

Timeline

• Start date: 2010-01-01
• Primary completion: 2013-01-01
• Completion: 2014-01-01
• First posted: 2010-10-27
• Last updated: 2017-04-11

Locations

2 sites across 1 country: Germany