Introduction:
Catheter ablation of atrial fibrillation (AF) is an established therapeutic rhythm approach in symptomatic patients. Obesity is a dominant driver of AF recurrence after ablation. Weight reduction strategies lower general AF burden and as such may be critical to long-term success rates after ablation.
Hypothesis:
Long-term outcomes after AF ablation will be better in obese patients with sustained weight loss.
Methods:
All patients that underwent an index ablation with a BMI recorded and >30 kg/m
2
and at least 3 years of follow-up were included (n=407). The group was separated and compared by weight trends over the 3 years (1. Lost >3% of index weight, n=141; 2. Maintained index weight ±3%, n=147; 3. Gained >3% of index weight at 3 years, n=119). Long-term outcomes included AF recurrence and a composite defined as major adverse clinical events, MACE (stroke/TIA, heart failure (HF) hospitalization, and death).
Results:
The average age was 63.6±10.4 years, 59.3% were male and 51.7% had paroxysmal AF. AF comorbidities include: hypertension (79.5%), heart failure (36.0%), sleep apnea (35.2%), diabetes (28.9%), and stroke/TIA (5.9%). Those that maintained their weight (HR: 1.45, p=0.05) and those that gained weight (HR 1.54, p=0.07) were more likely to have AF recurrence compared to those that lost weight. Similarly, MACE increased from 18.4% in those that lost weight at 3 years compared to 18.6% (HR 1.32, p=0.29) in those that maintained their weight and 26.5% in those that gained weight (HR 2.01, p=0.02). A small group of patients (n=5), lost >3% then gained it back and ultimately increased their weight by 3%. This group had the highest rates of AF recurrence (100%).
Conclusion:
Maintained weight loss is a critical component in reducing AF recurrence rates after index catheter ablation in obese patients. Sustained weight loss also results in a reduction in AF-related comorbidities and mortality.
Early and long-term outcomes after manual and remote magnetic navigation-guided catheter ablation for ventricular tachycardia
