Cited by 83Blood Pressure and Hypertension StudiesRenal and Vascular PathologiesRenin-Angiotensin System Studies

Catheter-Based Radiofrequency Renal Denervation: Location Effects on Renal Norepinephrine

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Henegar, Jeffrey R., Zhang, Yongxing, Hata, Cary, Narciso, Irvin, Hall, Michael E., Hall, John E.·2015·American Journal of Hypertension

Abstract

BACKGROUND: Clinical studies indicate that blood pressure (BP)-lowering effects of radiofrequency (RF) renal denervation (RD) are sustained for up to 2 years, although a recent clinical trial failed to find a major effect compared to sham treatment. In most previous studies, the efficacy of RD has not been assessed. The current study determined whether RD in different regions of the renal artery causes different degrees of RD as assessed with renal norepinephrine (NE) levels. METHODS AND RESULTS: Unilateral RD was performed on 14 pigs divided into 3 groups: RD near the ostium, in the main renal artery near the bifurcation, and in extrarenal branches of the renal artery. After 2 weeks post-RD, the pigs were euthanized, renal cortex tissue was collected for NE measurement, and renal arteries were prepared for histological analysis. Renal NE decreased by 12% with RD at the ostium, 45% with RD near the bifurcation in the main renal artery, and 74% when RD was performed in extrarenal artery branches. The number of renal nerves was greatest in extrarenal branches and in the main artery compared to the ostium and the average distance from the lumen was greatest for nerves at the ostium and least at the branches. CONCLUSIONS: RF RD lowers renal NE more significantly when performed in branches of the renal artery closer to the kidney. Increased efficacy of RF RD in extrarenal arterial branches may be due to the greater number of nerves in close proximity to the artery lumen in the branches.

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Crossref · 10.1093/ajh/hpu258

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  • Even under optimal conditions, catheter-based renal denervation methods ablate only 40-50% of renal nerves unless nerves running along the renal segmental arteries are also ablated.

    “Even under optimal conditions, catheter-based RDN methods ablate only 40–50% of renal nerves unless nerves running along the renal segmental arteries are also ablated167.”

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Authors
Henegar, J. R., Zhang, Y., Hata, C., Narciso, I., Hall, M. E., & Hall, J. E.
Affiliations
  • University of Missouri (US)
  • Center for Innovation and Strategic Collaboration, St. Jude Medical, Inc. 2   , Irvine, California , ;
  • University of Mississippi Medical Center (US)
Venue
American Journal of Hypertension
Published
2015-01-08
Volume
28
Issue
7
Pages
909-914
ISSN
  • 0895-7061 (ISSN-L)
  • 1941-7225
OpenAlex
W2002349269
Cited by
83
References
15
Citations by year
2026: 2 · 2025: 2 · 2023: 9 · 2022: 3 · 2021: 9 · 2020: 6 · 2019: 16 · 2018: 4 · 2017: 10 · 2016: 13 · 2015: 9
FWCI
8.73
Type
journal article
Language
en
Open access
Locations
  • American Journal of Hypertension (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (P01HL051971)
  • National Institute of General Medical Sciences (P20GM104357)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Renal and Vascular Pathologies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Renin-Angiotensin System Studies
Keywords
renal denervation, radiofrequency ablation, renal artery branches, hypertension, blood pressure reduction, catheter ablation, renal cortex, animal models
MeSH terms
Animals, Kidney, Norepinephrine, Radiography, Renal Artery, Swine, Sympathectomy, Time Factors, Down-Regulation, Catheter Ablation, Models, Animal

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