Left Atrial Volume Index Predicts Atrial Fibrillation Recurrence after Catheter Ablation Only in Obese Patients-Brief...

Area of Science:

• Cardiology
• Electrophysiology

Background:

• Obesity and higher body mass index (BMI) correlate with increased atrial fibrillation (AF) recurrence post-catheter ablation (CA).
• Left atrial volume index (LAVI) is also linked to AF recurrence and BMI, but its independent prognostic value is unclear.

Purpose of the Study:

• To investigate whether the prognostic impact of LAVI on AF recurrence after CA is independent of BMI.

Main Methods:

• Prospective study of 62 patients with paroxysmal AF undergoing radiofrequency CA.
• Echocardiography performed post-CA to measure cardiac function and morphology.
• AF recurrence defined as documented AF within 6 months post-procedure.

Main Results:

• AF recurrence observed in 27% of patients at 6 months.
• LAVI predicted AF recurrence significantly only in obese patients (BMI ≥ 30), not in non-obese patients (BMI < 30).
• No significant difference in recurrence rates between obese and non-obese groups was found.

Conclusions:

• LAVI is a significant predictor of AF recurrence post-successful CA specifically in obese patients.
• Findings suggest distinct AF mechanisms in obese versus non-obese individuals.
• Further research is warranted to elucidate these differences.