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  • Title: Renal denervation for mild-moderate treatment-resistant hypertension : A timely intervention?
    Author: Chen S, Kiuchi MG, Schmidt B, Hoye NA, Acou WJ, Liu S, Chun KRJ, Pürerfellner H.
    Journal: Herz; 2019 Aug; 44(5):412-418. PubMed ID: 29255910.
    Abstract:
    BACKGROUND: Renal denervation (RDN) has been proposed as a novel antihypertensive intervention for treating resistant hypertension. It remains to be investigated which patient groups can potentially benefit from RDN. The present study aimed to evaluate the efficacy and safety of RDN in patients with mild-moderate resistant hypertension, i. e., systolic office blood pressure (BP) of 140-160 mm Hg despite treatment with three antihypertensive drugs including one diuretic, or mean systolic BP by ambulatory BP monitoring (ABPM) of 135-150 mm Hg. METHODS: We evaluated data from four relevant clinical studies, all conducted in Europe, comprising 185 eligible patients. The patients' age was 62.1 ± 10.3 years and 73% were male (RDN group n = 149, control group n = 36). RESULTS: A self-control comparison showed that RDN led to significantly reduced ABPM at the 6‑month follow-up (systolic ABPM: 147.3 ± 13.4 mm Hg vs. 136.9 ± 15.5 mm Hg; diastolic ABPM: 81.1 ± 9.6 mm Hg vs. 76.2 ± 9.7 mm Hg; p < 0.001). RDN was associated with a greater improvement in ABPM as compared with that in the control group (∆systolic-ABPM: -10.4 ± 9.4 vs. -3.5 ± 9.6 mm Hg, p < 0.001; ∆diastolic-ABPM: -5 ± 5.8 vs. -2.1 ± 5.5 mm Hg; p = 0.005, respectively). The decrease of office BP in the RDN group was also statistically significant. RDN led to a reduced number of antihypertensive medications. No severe adverse events were found during follow-up. Regression analysis showed that the available baseline characteristics did not correlate with the ABPM improvement after RDN. CONCLUSION: RDN appears to be a safe and effective intervention for patients with mild-moderate resistant hypertension; however, randomized studies are warranted.
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