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Renal Artery Stenosis: Optimal Therapy and Indications for Revascularization

  • Peripheral Vascular Disease (MR Jaff, Section Editor)
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Abstract

Atherosclerotic renal artery stenosis (ARAS) is associated with increased cardiovascular risk and overall mortality. Manifestations of ARAS include resistant or malignant hypertension, progressive deterioration of renal function, and cardiac dysfunction syndromes of flash pulmonary edema and angina. Diagnosis rests upon non-invasive studies such as duplex ultrasonography and is confirmed using invasive renal arteriography. Regardless of the severity of ARAS, management of this entity has been a topic of contentious debate. For over two decades, the use of percutaneous revascularization to treat ARAS has been studied with various clinical trials. Though case series seem to demonstrate favorable clinical response to revascularization, the overwhelming majority of randomized clinical trials have not mirrored a robust outcome. In these trials, poor correlation is noted between the reduction of stenosis and the improvement of renovascular hypertension and glomerular filtration rate, and decrease in cardiovascular outcomes and mortality. With dichotomizing results, the explanation for these discrepant findings has been attributed to improper trial design and inappropriate patient selection. An overview of the treatment options available will be provided, with a focus on the methodology and design of clinical trials investigating the efficacy of percutaneous revascularization. Emphasis is placed on appropriate patient selection criteria, which may necessitate the use of hemodynamic lesion assessment and clinical correlation based on individualized care. When clinical equipoise exists between optimal medical therapy and revascularization, the current paradigm supports ongoing medical therapy as the treatment of choice. However, renal artery stenting remains a viable therapeutic option for those who continue to have clinical syndromes consistent with renal hypoperfusion while adequately treated with optimal medical therapy. Despite observational studies suggesting clinical benefit for this specific patient population, there remains a paucity of randomized clinical trial data. Further trials targeting the patients who are inadequately treated with optimal medical therapy need to be undertaken to confirm the efficacy of revascularization.

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Conflict of Interest

Sandeep M. Patel and Jun Li declare that they have no conflict of interest. Sahil A. Parikh serves as a consultant for Abbott Vascular, Boston Scientific, and Medtronic and receives research support from Abbott Vascular, Boston Scientific, Medtronic, TriReme Medical, and Atrium Medical.

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This article does not contain any studies with human or animal subjects performed by any of the authors.

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  1. Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH, USA

    Sandeep M. Patel, Jun Li & Sahil A. Parikh

  2. Division of Cardiovascular Medicine, Harrington Heart and Vascular Institute, University Hospitals Case Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA

    Sandeep M. Patel, Jun Li & Sahil A. Parikh

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  1. Sandeep M. Patel
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Patel, S.M., Li, J. & Parikh, S.A. Renal Artery Stenosis: Optimal Therapy and Indications for Revascularization. Curr Cardiol Rep 17, 76 (2015). https://doi.org/10.1007/s11886-015-0623-7

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