Cryoballoon Pulmonary Vein Isolation With Versus Without Additional Right Atrial Linear Ablation for Persistent...

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Pulmonary vein isolation (PVI) alone demonstrates limited efficacy for persistent atrial fibrillation (AF) compared to paroxysmal AF.
• Cryoballoon PVI (Cryo-PVI) is a common treatment for AF, but outcomes in persistent AF can be suboptimal.

Purpose of the Study:

• To evaluate the effectiveness of additional right atrial (RA) linear ablation combined with Cryo-PVI in patients with persistent AF.
• To compare rhythm outcomes between Cryo-PVI with additional RA ablation versus Cryo-PVI alone.

Main Methods:

• A multicenter, randomized clinical trial involving 289 patients with persistent AF refractory to antiarrhythmic drugs.
• Patients were randomized to either Cryo-PVI with additional RA linear ablation or Cryo-PVI alone.
• The primary endpoint was documented atrial arrhythmia recurrence after a 3-month blanking period, with a median follow-up of 24 months.

Main Results:

• Atrial arrhythmia recurrence was significantly lower in the group receiving additional RA ablation (37.5%) compared to Cryo-PVI alone (53.1%).
• No significant difference was observed in complication rates between the two groups.
• Total procedure time was longer for the combined ablation strategy (median 88 minutes vs. 72 minutes).

Conclusions:

• Additional right atrial linear ablation performed alongside cryoballoon PVI enhances ablation outcomes in patients with persistent atrial fibrillation.
• This combined approach offers improved rhythm control compared to pulmonary vein isolation alone for persistent AF.