Mental Stress, Autonomic Function, and Heart Disease

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00005524
First received: May 25, 2000
Last updated: July 11, 2005
Last verified: July 2005
  Purpose

To examine the vagal, vascular sympathetic, and mechno-structural components of baroreflex regulation in coronary artery disease (CAD) patients and healthy age-matched controls during rest and acute laboratory stress.


Condition
Cardiovascular Diseases
Heart Diseases
Coronary Disease

Study Type: Observational
Study Design: Observational Model: Case Control

Resource links provided by NLM:


Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: September 1998
Estimated Study Completion Date: August 2003
Detailed Description:

BACKGROUND:

The strong association between mental stress and morbid cardiovascular events in coronary artery disease (CAD) patients may derive from stress-induced cardiac ischemia due to exaggerated increases in vascular resistance and arterial pressure. In fact, this may explain part of the prognostic relationship of baroreflex cardiac vagal control to cardiovascular outcome among CAD patients. The hemodynamic responses to psychological stress are buffered by the arterial baroreflex; thus, exaggerated pressor responses to mental stress may result from impaired baroreflex regulation in CAD patients.

DESIGN NARRATIVE:

The study has three components. The first component characterizes the relationships between vascular stiffness and baroreflex regulation among CAD patients, also contrasting healthy control subjects with CAD patients. The second component examines, in relation to individual differences in pharmacologically derived estimates of baroreflex function, changes in autonomic and baroreflex control during laboratory psychological stress among CAD patients and among healthy control subjects. The third component tests the hypothesis that impaired baroreflex regulation in CAD patients, due to increased vascular stiffness and/or attenuated autonomic control, is associated with exacerbated hemodynamic reactions to psychological stress. Bolus vasoactive drug infusions in combination with Finapres beat-by-beat arterial pressures and carotid B-mode ultrasonography are used to evaluate baroreflex sensitivity and arterial stiffness. Baroreflex adjustments to psychological stress are assessed by power spectral-derived relations between arterial pressure and cardiac chronotropy during a mental arithmetic task and a speech task. The degree to which indices of baroreflex function are associated with hemodynamic responses to psychological stress among CAD patients is assessed.

  Eligibility

Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

No eligibility criteria

  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00005524

Sponsors and Collaborators
Investigators
Investigator: Andrew Taylor Hebrew Rehabilitation Center for Aged
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00005524     History of Changes
Other Study ID Numbers: 5051
Study First Received: May 25, 2000
Last Updated: July 11, 2005
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Coronary Disease
Coronary Artery Disease
Heart Diseases
Myocardial Ischemia
Vascular Diseases
Arteriosclerosis
Arterial Occlusive Diseases

ClinicalTrials.gov processed this record on August 19, 2014