Additive effects of combined angiotensin-converting enzyme inhibition and angiotensin II antagonism on blood pressure and renin release in sodium-depleted normotensives

What Was Tested

Researchers studied Angiotensin II in the context of low blood pressure and orthostatic hypotension in this randomized controlled trial publication.

This intermittent partial "escape" is explained either by a renin-mediated reactive rise in plasma Ang I or by non-ACE-dependent Ang II generation.

The researchers therefore tested the hypothesis that a combination of ACE inhibition and Ang II blockade may have additive biological and hemodynamic effects.

Who Took Part

The age groups tagged for this paper are teenagers and adults, men only.

How the Study Was Run

The researchers set it up as a randomized, double-blind and crossover study.

The participants were allocated by chance, so the Angiotensin II group and the comparison group should start out alike.

Neither the participants nor the staff measuring them knew who was on Angiotensin II, so expectations could not easily colour the readings.

Each person switched between Angiotensin II and the comparison at some point, usually with a gap in between.

What Was Measured

The researchers therefore tested the hypothesis that a combination of ACE inhibition and Ang II blockade may have additive biological and hemodynamic effects.

The subject headings attached to it are Aldosterone, Angiotensin I, Angiotensin II, Angiotensin-Converting Enzyme Inhibitors, Blood Pressure, Drug Synergism and Heart Rate.

What This Means in Plain Language

The paper is a randomized, double-blind and crossover study of Angiotensin II in people with low blood pressure and orthostatic hypotension.

Its findings take up roughly 9 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 1995 (Circulation), a journal based in United States.

More context: the Angiotensin II compound page, Low blood pressure and orthostatic hypotension research.