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NCT00005346 Clinical Trial

Mechanisms Underlying Abnormal Ambulatory BP Patterns

Hypertension Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data
NCT number NCT00005346
Other study ID # 4215
Secondary ID R01HL046177
Status Completed
Phase N/A
First received May 25, 2000
Last updated May 12, 2016
Start date January 1993
Est. completion date December 1995

Study information
Verified date November 2001
Source National Heart, Lung, and Blood Institute (NHLBI)
Contact n/a
Is FDA regulated No
Health authority United States: Federal Government
Study type Observational

Clinical Trial Summary

To understand the mechanism(s) underlying sodium-dependent blood pressure control, and to determine the consequences thereof.

Description:

BACKGROUND:

The blood pressure of a significant percentage of the hypertensive population, and the normotensive population at a high risk for the development of hypertension (Blacks and older individuals), is sodium (salt)-dependent. That is to say, increasing the intake of salt will increase blood pressure in these individuals; conversely, and more importantly, decreasing the intake of salt will reduce blood pressure.

DESIGN NARRATIVE:

The investigators believed that the mechanisms responsible for sodium-dependent blood pressure were only indirectly linked to race, sex, and age. Their research was consistent with the hypothesis that sodium-dependent blood pressure control resulted from decreased responsiveness of the renal and adrenal blood pressure regulatory systems. This produced abnormal daily blood pressure patterns, with reduced fluctuation resulting in extended periods of increased blood pressure. The increased cardiovascular load led to the early development of cardiovascular and renal disease, including hypertension. They tested this hypothesis by identifying 'high risk' and 'normal risk' subjects based on renal responses to sodium restriction. The subjects were equal numbers of healthy males and females, Blacks and whites, between the ages of 55-70 years. Using an innovative approach, they then examined the influence of risk status on 24-hour patterns of blood pressure, hormonal activity, and sodium handling. Finally, they determined the clinical significance of the profiles by examining changes in cardiac and renal status at a two-year follow-up.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Recruitment information / eligibility
Status Completed
Enrollment 0
Est. completion date December 1995
Est. primary completion date
Accepts healthy volunteers No
Gender Male
Age group N/A to 100 Years
Eligibility No eligibility criteria

Study Design

N/A

Related Conditions & MeSH terms

Locations
Country Name City State
n/a

Sponsors (1)
Lead Sponsor Collaborator
National Heart, Lung, and Blood Institute (NHLBI)
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