Study of Norepinephrine Levels and Sympathetic Nervous System Activity

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00001329
First received: November 3, 1999
Last updated: March 3, 2008
Last verified: September 2002
  Purpose

Brain and nerve cells communicate with each other by releasing and picking up chemicals called neurotransmitters. Norepinephrine is a neurotransmitter used by part of the nervous system activated during stress called the sympathetic nervous system. The sympathetic nervous system is involved with regulating blood pressure and pulse rate. Researchers believe the level norepinephrine in the blood can be used to measure activity of the sympathetic nervous system.

This study is designed to answer important questions about rates of release of norepinephrine into the blood stream, removal of released norepinephrine, and the sympathetic nervous system response to stress.

Researchers will attempt to measure levels of norepinephrine and activity of the sympathetic nervous system in patients with high blood pressure, normal patients with family histories of high blood pressure, patients taking drugs that can effect levels of norepinephrine, and patients with diseases or conditions directly affecting the sympathetic nervous system.


Condition
Autonomic Nervous System Disease
Healthy
Hypertension

Study Type: Observational
Official Title: Plasma Catecholamine Kinetics

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 50
Study Start Date: September 1992
Estimated Study Completion Date: September 2002
Detailed Description:

In order to examine sympathetic nervous system function in neurocardiological disorders and catecholaminergic effects of dietary manipulations or neuropsychiatric drugs, the protocol calls for evaluations of the kinetics of 3H-norepinephrine or 3H-epinephrine in patients with hypertension, dysautonomias, or disorders thought to involve abnormal catecholaminergic function, and in normotensive normal volunteers. Apparent spillover and clearance rates are estimated based on the norepinephrine or epinephrine concentration during the infusion and their steady-state specific activities, under resting conditions and in response to physiological or pharmacological manipulations thought to affect sympathetic outflows.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Must be greater than or equal to 18 years of age.

Must not be pregnant or lactating.

  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00001329

Locations
United States, Maryland
National Institute of Neurological Disorders and Stroke (NINDS)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00001329     History of Changes
Other Study ID Numbers: 920259, 92-N-0259
Study First Received: November 3, 1999
Last Updated: March 3, 2008
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Yohimbine
Catecholamines
Sympathoadrenal Response
Sympathetic Nervous System
Stress
Hypertension
Autonomic Failure

Additional relevant MeSH terms:
Autonomic Nervous System Diseases
Primary Dysautonomias
Hypertension
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases

ClinicalTrials.gov processed this record on April 17, 2014