A Study of Renal Function in Orthostatic Hypotension

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Abstract
Renal function studies have been carried out in both the recumbent and in the oblique position in 2 cases of orthostatic hypotension. In both cases a definite fall in plasma flow and glomerular filtration rate took place, but this occurred only after registration of a considerable fall in blood pressure. The filtration fraction remains unchanged after the fall in blood pressure. The extraction ratio remains unchanged after a considerable fall in blood pressure. The data may indicate that the renal function becomes normal if blood pressure is kept on a low level over a fairly long period. However, further observations are required before any definite conclusion may be drawn.

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