|Values are valid only on day of printing.|
The renin in plasma is allowed to act on the plasma's endogenous substrate, angiotensinogen, producing angiotensin I. This is measured by mass spectrometry. Renin activity is expressed in nanograms of angiotensin produced per milliliter of plasma per hour of incubation.(Fredline VF, Kovacs EM, Taylor PJ, Johnson AG: Measurement of plasma renin activity with use of HPL celectrospray-tandem mass spectrometry. Clin Chem 1999 May;45:659-664)
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