Drug-resistant hypertensive patients responding to multielectrode renal denervation exhibit improved heart rate dynamics and reduced arrhythmia burden

Transluminal renal sympathetic denervation (RDN) reduces blood pressure (BP) in patients with drug-resistant uncontrolled hypertension. We assessed the effect of RDN on heart rate, supraventricular and ventricular ectopic activity and indexes of heart rate variability in 14 patients with drug-resistant uncontrolled hypertension who were all responders to RDN (defined as a reduction in office systolic BP ⩾10 mm Hg) at baseline and at 1 and 6 months after the procedure using the multielectrode EnligHTN ablation catheter (St Jude Medical). Office and 24-h systolic and diastolic BP were significantly reduced both at 1 and 6 months after RDN and all patients were office BP responders. There was a trend toward office heart rate reduction (by 6.9 b.p.m., P =0.064) at 1 month and a significant reduction by 10 b.p.m. ( P =0.004) at 6 months. Mean 24-h Holter monitoring heart rate was reduced by 6.7 b.p.m. ( P =0.022) at 1 month and by 5.3 b.p.m. ( P =0.010) at 6 months after RDN. The total number of premature supraventricular and ventricular contractions was significantly decreased and time- and frequency- domain indexes were increased both at 1 and at 6 months after RDN ( P