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Influence of AV junction radiofrequency catheter ablation on the clinical outcome in patients with atrial fibrillation

We comparatively evaluated the clinical outcome after AV junction radiofrequency catheter ablation in 15 patients (Pts) with chronic (chr) and 24 Pts with paroxysmal (par) atrial fibrillation (AF). In all Pts, clinical evaluation included symptoms, NYHA class, exercise test before and after ablation, and mortality rate. Mean follow-up was 17 months in Pts with chr and 15 months in Pts with par AF. Before ablation, the incidence of dypnea was higher in Pts with chr AF (p<0.01) while the incidence of syncope was higher in Pts with par AF (p<0.05). Pts with chr AF had lower NYHA classification and lower oxygen consumption during exercise test (p<0.05, p<0.01, respectively).After ablation, 9 Pts with chr AF and 3 Pts with par AF improved from NYHA class III/II to class II/I (p<0.01). The incidence of symptoms and mortality rate were similar among the groups. The benificial effect of AV junction ablation seems to be more expressive in Pts with chr AF.

AV junction ablation; atrial fibrillation; outcome

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