[Interventional treatment of typical atrial flutter]

Area of Science:

• Electrophysiology
• Cardiac Arrhythmias
• Interventional Cardiology

Context:

• Typical atrial flutter (AFL) is a common arrhythmia characterized by a consistent reentrant circuit.
• Anatomic barriers in the right atrium, particularly the cavotricuspid isthmus, play a crucial role in maintaining the AFL circuit.
• Multisite endocardial mapping has elucidated the activation patterns in typical AFL.

Purpose:

• To evaluate the efficacy and safety of catheter ablation for typical atrial flutter (AFL).
• To assess the long-term success rates and recurrence of AFL after cavotricuspid isthmus ablation.
• To establish catheter ablation as a first-line therapy for symptomatic typical AFL.

Summary:

• Catheter ablation targets the critical area of slow conduction in the cavotricuspid isthmus to achieve bidirectional block.
• The procedure, performed using irrigated or standard tip catheters, aims to terminate the reentrant circuit responsible for typical AFL.
• Post-ablation assessment confirms stable, bidirectional block of the cavotricuspid isthmus, ensuring procedural success.

Impact:

• Catheter ablation demonstrates high long-term efficacy (>90%) with a low recurrence rate for typical AFL.
• The procedure is safe, effective, and significantly improves the quality of life for patients with symptomatic typical AFL.
• Catheter ablation is recognized as an alternative first-line therapy for sustained, symptomatic typical AFL.