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Perspectives in Vascular Surgery and Endovascular Therapy
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Current Perspectives on the Role of Captopril Imaging in the Diagnosis of Renovascular Disease

Kathryn A. Collins, M.D.

Section of Vascular Surgery, Yale University School of Medicine, New Haven, CT

Richard J. Gusberg, M.D.

Section of Vascular Surgery, Yale University School of Medicine, New Haven, CT

As the population ages, renal artery stenosis has been increasingly detected among patients with refractory hypertension and/or renal dysfunction. There is a need for a safe, simple, reliable, cost-effective method for detecting clinically significant renal artery stenoses in patients who will benefit from revascularization. The asymmetric renal response to angiotensin converting enzyme inhibition in the setting of renal artery stenosis is the basis for several diagnostic techniques that screen patients with suspected renal artery stenoses to determine functional significance. Captopril renal scintigraphy is the most widely applied, however, ACE inhibition in conjunction with ultrasound and magnetic resonance are the focus of the most recent research. This review focuses primarily on the physiologic basis, indications, techniques and utility of captopril renal scintigraphy. Newer captopril imaging methods are introduced and consideration given to practical issues such as cost and risk/benefit analysis.

Key Words: Captopril • renal artery • radioisotope renography

Perspectives in Vascular Surgery and Endovascular Therapy, Vol. 13, No. 1, 43-69 (2000)
DOI: 10.1177/153100350001300109
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