Expired Study
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San Diego, California 92103


Purpose:

High blood pressure is a common health problem among people in the United States. This study will examine the ways that stress and ethnicity play a role in the development of high blood pressure.


Study summary:

High blood pressure affects nearly one third of all people in the United States. It can be caused by many factors, including obesity, sodium intake, genetics, and stress. Ethnicity appears to also play a role, because African Americans are more susceptible to developing high blood pressure than other ethnic groups, with more than 40% of African Americans diagnosed with this condition. This study will examine the underlying reasons of why stress and African-American ethnicity contribute to high blood pressure risk and how ethnicity and stress interact with each other to increase this risk. Specifically, study researchers will examine how stress increases blood pressure, how people from different ethnic groups respond to stress differently, and how sleep plays a role in regulating blood pressure levels. This study will enroll African Americans and Caucasians who have high blood pressure, as well as African Americans and Caucasians who have normal blood pressure. Potential participants will go through a screening process that involves a medical history review, questionnaires, and blood pressure monitoring. Eligible participants will then be admitted to the research clinic for a 2-night stay. Participants' nutrition history and body measurements will be obtained, and a catheter will be inserted into the arm so that blood can be easily collected during the clinic stay. During the night, participants' breathing habits and movements will be monitored while they sleep. During the day, blood pressure and heart activity will be monitored frequently, including when participants are asked to perform mildly stressful tasks, such as giving a short speech. Various medications that affect heart rate and blood pressure will be given at different times during the study, and researchers will monitor participants' reactions to each medication. Lastly, participants will also complete psychological questionnaires.


Criteria:

Inclusion Criteria: - Self-identifies as African American or Caucasian - Weighs 85% to 150% of ideal weight (approximate BMI of 17.5 to 30) - In good physical health Exclusion Criteria: - Blood pressure greater than 180/110 mm Hg at any point in the past - Currently works less than half-time - Currently is employed doing shift work - Currently takes prescription medication, other than anti-hypertensive medication - Currently smokes


NCT ID:

NCT00783497


Primary Contact:

Principal Investigator
Joel E. Dimsdale, MD
University of California, San Diego


Backup Contact:

N/A


Location Contact:

San Diego, California 92103
United States



There is no listed contact information for this specific location.

Site Status: N/A


Data Source: ClinicalTrials.gov

Date Processed: October 09, 2019

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