Angiotensin II and the Natriuretic and Blood Pressure Response to Mental Stress in African Americans

What Was Tested

This randomized controlled trial paper looks at Angiotensin II in the context of low blood pressure and orthostatic hypotension.

To test the hypothesis that Angiotensin II (Ang II) is a contributing factor to the response pattern in African Americans (AAs) who retain rather than excrete sodium during mental stress.

Who Took Part

The age groups tagged for this paper are adults and middle-aged adults, men only.

Double-blind, randomized, cross-over trial of 87 healthy AAs aged 18 to 50 years.

Urinary sodium excretion (UNaV) and systolic blood pressure (SBP) were collected prior to and throughout a mental stress protocol (rest and stress period).

How the Study Was Run

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

Because people in this Angiotensin II study were split into groups at random, differences between the groups are less likely to reflect who happened to join each one.

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

A placebo (an inactive look-alike) gave the Angiotensin II group a baseline to be compared against.

In the crossover set-up each of the participants took both Angiotensin II and the comparison in turn, acting as their own control.

What Was Measured

PubMed files the paper under topics including Black or African American, Angiotensin II, Angiotensin Receptor Antagonists, Blood Pressure, Diuretics, Healthy Volunteers and Irbesartan.

The authors tagged it with the keywords Excreters, Retainers, Sodium Retention, Stress and Systolic Blood Pressure.

What This Means in Plain Language

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

The abstract goes on to report its results in about 6 sentences; this page does not restate them, so read the paper for the findings and their limits.

The publication is from 2018 (Ethnicity & disease), a journal based in United States.

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