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Renal denervation improves blood pressure and arterial stiffness
Date:8/27/2012

The researchers studied 21 patients with therapy resistant hypertension (61.9% men; mean age 64 years; 5.01.3 antihypertensive drugs) and 6 controls (83.3% men; mean age 57 years; 4.32.3 antihypertensive drugs). The inclusion criteria were: (i) use of >3 antihypertensive drugs, (ii) peripheral blood pressure at baseline ≥150 mmHg, and (iii) exclusion of secondary hypertension and anatomical abnormalities of the renal arteries.

RDN was performed with an RDN radiofrequency ablation catheter system (1). Central hemodynamics and arterial stiffness, i.e. pulse wave velocity (PWV), were recorded with an Arteriograph device (2). Measurements were performed at baseline, and 3 and 6 months after the intervention.

RDN led to an improvement in all parameters compared to baseline. Peripheral systolic blood pressure improved by 7.6% (145 mmHg versus 156 mmHg, p<0.05) after 3 months and by 5.4% (148 mmHg versus 156 mmHg, p<0.05) after 6 months. Central systolic blood pressure improved by 9.5% (147 mmHg versus 161 mmHg, p<0.01) after 3 months and by 6.6% (151 mmHg versus 161 mmHg, p<0.05) after 6 months. Most importantly, PWV improved significantly, both at 3 months (9.41.2 m/s versus 10.91.8 m/s, p<0.01) and 6 months (9.71.8 m/s versus 10.91.8 m/s, p<0.01). Univariate analysis of variance (f-test) showed that the improvement of PWV was, at least in part, blood pressure independent.

In controls no significant changes in blood pressure values or PWV were observed.

"Besides peripheral blood pressures, RDN improved central blood pressures and arterial stiffness, i.e. PWV," said Mr Franzen. "According to age adjusted reference values, the improvement of approximately 1m/s PWV observed in our study could be interpreted as a blood vessel rejuvenation of almost 10 years. This suggests that RDN might be a fountain of youth for blood vessels in patients with therapy resistant hypertension."

He added: "Further studies are needed to de
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Contact: ESC Press Office
press@escardio.org
European Society of Cardiology
Source:Eurekalert

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