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Related Experiment Videos

Special uses for captopril.

B J Materson

    American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation
    |July 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Captopril significantly improves the accuracy of renal vein renin assays for diagnosing renal artery stenosis (RAS). This ACE inhibitor also shows major value in treating scleroderma renal crisis (SRC), enhancing patient survival.

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    Area of Science:

    • Nephrology
    • Cardiovascular Medicine
    • Endocrinology

    Background:

    • Plasma renin activity (PRA) is a key biomarker in hypertension.
    • Diagnosing renal artery stenosis (RAS) can be challenging with existing methods.
    • Scleroderma renal crisis (SRC) historically had a poor prognosis.

    Purpose of the Study:

    • To evaluate captopril's impact on the diagnostic accuracy of renal vein renin assays for RAS.
    • To assess captopril's therapeutic utility in managing SRC.
    • To explore captopril's effect on PRA and its diagnostic implications.

    Main Methods:

    • Administering captopril (25-50 mg orally) before renal vein PRA sampling.
    • Analyzing the ratio of PRA in venous blood from affected vs. contralateral kidneys in RAS patients.

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  • Reviewing outcomes of SRC patients treated with captopril and other antihypertensives.

    • Main Results:

    • Captopril markedly increases PRA, enhancing the sensitivity and specificity of renal vein renin assays for RAS diagnosis.
    • The captopril-induced PRA ratio can help differentiate RAS from essential hypertension.
    • A minimal PRA response to captopril may indicate primary aldosteronism.
    • Captopril has demonstrated success in treating some patients with SRC and idiopathic edema.

    Conclusions:

    • Captopril significantly enhances the diagnostic accuracy of renal vein renin assays for RAS.
    • Captopril is valuable in the management of scleroderma renal crisis, improving patient survival.
    • Captopril's effects on PRA provide crucial diagnostic and therapeutic insights.