Successful radiofrequency ablation in patients with previous atrial fibrillation results in a significant decrease in...

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Atrial fibrillation (AF) is a common arrhythmia.
• Left atrial (LA) size is a known predictor of AF recurrence.
• Pulmonary vein (PV) isolation is a standard treatment for AF.

Purpose of the Study:

• To evaluate the relationship between freedom from AF and LA size.
• To assess the impact of PV isolation and LA ablation on LA dimensions.
• To determine if LA size predicts procedural success in AF ablation.

Main Methods:

• 105 patients with paroxysmal or persistent AF underwent circumferential PV isolation and LA ablation.
• A 3D electroanatomic mapping system was used for precise ablation targeting.
• Follow-up duration averaged 14.6 months to assess procedural success and LA size changes.

Main Results:

• Successful AF ablation in persistent AF patients led to a decrease in LA dimension (44.0 to 40 mm).
• Recurrent AF was associated with an increase in LA dimension (45 to 49 mm).
• Successfully treated paroxysmal AF patients showed a significant reduction in LA dimension (40.5 to 37.5 mm).

Conclusions:

• Medium-term success in radiofrequency ablation for AF is significantly related to LA size.
• Persistent sinus rhythm post-ablation is associated with reduced LA dimensions.
• Recurrent AF is linked to increased LA dimensions, highlighting its role as a prognostic indicator.