Confluent Extended Posterior Left Atrial Wall Ablation: Thinking Inside the Box.

Area of Science:

• Cardiology
• Electrophysiology
• Minimally Invasive Cardiac Procedures

Background:

• Atrial fibrillation (AF) remains a significant challenge, particularly persistent and longstanding forms.
• Existing ablation techniques often require multiple procedures or combination therapies.
• The Convergent hybrid procedure aims to improve AF ablation outcomes.

Purpose of the Study:

• To evaluate the intermediate-term efficacy and safety of an extended posterior left atrial wall epicardial ablation technique.
• To assess the success rate of the Convergent hybrid procedure for eliminating AF substrates.
• To report follow-up data on freedom from AF and other arrhythmias.

Main Methods:

• Utilized confluent epicardial radiofrequency ablations on the posterior left atrial wall.
• Combined epicardial ablation with endocardial pulmonary vein isolation (PVI) and cavotricuspid isthmus ablation.
• Conducted clinical follow-up and continuous monitoring for up to 24 months in 57 patients with persistent or longstanding persistent AF.

Main Results:

• Achieved 64.5% single-procedure freedom from AF at 24 months.
• Reported 58.9% freedom from all arrhythmias at 24 months.
• 68% of patients discontinued antiarrhythmic drugs; only 7% required a repeat endocardial procedure.

Conclusions:

• The extended posterior left atrial wall ablation, as part of the Convergent hybrid method, demonstrates notable single-procedure success.
• This technique is effective in a challenging patient population with persistent or longstanding persistent AF.
• The approach offers a promising option for AF management, reducing arrhythmia burden and medication reliance.