The clinical records of consecutive patients with symptomatic, drug-refractory paroxysmal AF who underwent pulmonary vein antral isolation were analysed. The study population consisted of 104 patients (64 males, mean age 57.9 ¡À 10.9 years) with paroxysmal AF. Based on AF triggers, patients were classified in those with vagotonic (31.7 % ), adrenergic (17.3 % ) and random AF (51 % ). Subjects with adrenergic and random AF tended to be older (p: 0.104) and displayed a higher incidence of hypertension (p: 0.088) compared with those with vagotonic AF. Following a mean follow-up period of 14.7 ¡À 7.4 months, 74 patients were free from arrhythmia recurrence (71.2 % ). Late arrhythmia recurrence (> 3 months from the index procedure) occurred in 33.3 % , 16.7 % and 30.2 % of patients with vagotonic, adrenergic and random AF, respectively (p: 0.434). Cox regression analysis showed that early AF recurrence [hazard ratio (HR) 15.76; 95 % confidence interval (CI) 5.456-45.566, p: < 0.001], left atrial volume (HR 0.969; 95 % CI 0.942-0.996, p: 0.025) and statin use (HR 6.828; 95 % CI 2.078-22.437 p: 0.002) were independent predictors of late arrhythmia recurrence.
In this study cohort, the type of paroxysmal AF was not associated with arrhythmia recurrence following left atrial ablation.