Key result
Segmental renal vein sampling detects higher renin levels than main vein sampling in segmental artery stenosis.
Why the study?
Renin levels from segmental renal veins may differ from those in the main renal vein in hypertensive patients with segmental renal artery abnormalities, but this has not been characterized.
Does segmental renal vein sampling reveal significant sources of renin production compared to main renal vein sampling in hypertensive patients?
Observational (n=25)
Does segmental renal vein sampling reveal significant sources of renin production compared to main renal vein sampling in hypertensive patients?
Segmental renal vein sampling can identify localized sources of renin production that may be missed by main renal vein sampling in hypertensive patients with segmental renal lesions.
Answers are grounded in this paper and cite their sources.
May detect occult renin sources missed by main sampling; leaves open whether it improves selection for intervention.
Segmental renal vein sampling was performed in 25 hypertensive patients. In those with no arteriographic abnormalities or stenosis of only the main renal artery, renin levels from segmental veins were the same as those from the ipsilateral main renal vein. In patients with an infarction of a renal segment or stenosis of a segmental renal artery, the renin level from the corresponding segmental vein was often much higher than that from the main renal vein. Segmental vein sampling may reveal a significant source of renin production not apparent in samples from the main renal vein.
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Korobkin et al. (1976) conducted an observational in Hypertension (n=25). Segmental renal vein sampling vs. Main renal vein sampling was evaluated on Renin levels. Segmental renal vein sampling revealed much higher renin levels than main renal vein sampling in hypertensive patients with segmental renal artery stenosis or infarction.
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