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Renal denervation alters ambulatory blood pressure-derived salt sensitivity index in patients with uncontrolled hypertension. | LitMetric

Background: Renal denervation (RDN) has been proven in multiple sham-controlled trials to lower blood pressure (BP) in various forms of hypertension. RDN-mediated interruption of sympathetic signaling through its effects on renal blood flow, salt retention, and renin release are likely contributors to the BP-lowering effects. However, the impact of RDN on salt sensitivity in humans has not yet been explored.

Methods: We, therefore, investigated the effect of RDN on ambulatory BP monitoring-derived salt sensitivity in a cohort of patients with uncontrolled hypertension on habitual salt intake. RDN was performed in 153 hypertensive patients, who were categorized into low intermediate and high-salt sensitivity groups, based on the ambulatory BP monitoring-derived salt sensitivity index estimated prior to (baseline) and at 3, 6 and 12 months after the procedure as previously described. Crude and adjusted mixed effects ordinal regression models were fitted to test for changes in the proportions of salt sensitivity risk during follow-up.

Results: The proportions of individuals in the intermediate and high-salt sensitivity risk group increased after RDN and the odds for being in a higher estimated salt sensitivity risk group at 3, 6 and 12 months follow-up compared with baseline were highly significant during the 12 months follow-up period.

Conclusion: Increased salt sensitivity after RDN may represent a compensatory mechanism to maintain renal capacity for adequate salt handling. This novel finding may have implications for patient management after RDN, such as prescription of salt moderation to further optimize RDN-induced BP-lowering efficacy.

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Source
http://dx.doi.org/10.1097/HJH.0000000000003050DOI Listing

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