Effect of age on clinical impact and mid-term denervation in patients undergoing cardioneuroablation.

Cardioneuroablation (CNA) represents a promising therapy for recurrent vasovagal syncope (VVS), extrinsically driven atrioventricular block (AVB) and sinus node dysfunction (SND). However, effectiveness in patients aged 50 and above is not well-established. In this prospective study of patients referred for CNA, we compared syncope and pacemaker implantation free survival, heart rate (HR) variability (HRV) and quality of life between two age groups: group A (< 50 years) and B (≥ 50 years). A total of 50 patients were included (17 Group A and 33 Group B). The etiologies comprised VVS (56%), AVB (22%), and SND (22%). After a median follow-up of 17.0 (12.5-26.0) months, there were no differences of the combined endpoint of syncope or pacemaker implantation free-survival between groups (29.4.% vs. 21.2%; p-log-rank = 0.736). 84% of the entire cohort remained free from syncope, with a better but not significant syncope free survival in the older group (23.5% vs. 12.1%; p-log rank = 0.486). There were no differences in pacemaker implantation rate (A 5.9% vs. B 17.6%; p log-rank = 0.658). Notably, older patients had lower HR values post-procedure compared to younger patients (68.9 ± 13.3 vs. 80.4 ± 16.3 bpm; p = 0.012). Both groups exhibited a decrease in HRV parameters and an improvement in quality of life. In conclusion, CNA has comparable clinical benefits for patients aged 50 and above in terms of syncope or pacemaker implantation free survival and HRV reduction when compared to younger patients.