Long-term outcome of renal nerve denervation (RDN) for resistant hypertension.

We aimed to determine the long-term outcome of renal denervation (RDN). All patients with resistant hypertension who underwent RDN between 2012 and 2018 at Siriraj Hospital were included in the study. Patients were followed up at 3, 6, and 12 months and then annually up to 9 years. Effectiveness of the RDN outcome was defined by either (1) a reduction in office systolic BP ≥ 10 mmHg, (2) a reduction in the number of antihypertensive drugs taken, or (3) both outcomes being achieved. In total, 18 RDN procedures were performed during the study period. The mean and longest follow-up periods were 52 months and 104 months, respectively. Heterogeneous BP responses after RDN for resistant hypertension were observed. Effectiveness of the RDN outcome was achieved in 88% of the patients at 1 year and in >80% of the patients during the entire follow-up at each time point up to 9 years.