The Effect of Exercise Training on Mental Stress-Induced Silent Ischemia

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00018252
Recruitment Status : Completed
First Posted : July 5, 2001
Last Update Posted : January 21, 2009
Information provided by:
VA Office of Research and Development

Brief Summary:
Coronary artery disease (CAD) remains the leading cause of death in the elderly. Silent myocardial ischemia (SI) is a manifestation of CAD in which there is a transient alteration in myocardial perfusion, function, and/or electrical activity not accompanied by chest pain. Mental and emotional stress, in particular hostility and anger are potent inducers of SI, Individuals with SI are at a 3-5 fold higher risk for the development of angina, myocardial infarction and death than subjects without SI.

Condition or disease Intervention/treatment Phase
Myocardial Ischemia Behavioral: exercise Not Applicable

Detailed Description:
The hypothesis of this study is that older individuals with occult cad, mental stress/ emotional arousal (anger) increases sympathetic nervous system activity resulting in vasoconstriction thereby eliciting transient episodes of SI. Therefore an aerobic exercise intervention that reduces the response to anger/hostility and improves vascular compliance will decrease the ischemic burden in SI patients. The specific objectives are: To determine if non-smoking older individuals with exercise-induced SI have increased vasoreactivity (blood pressure, heart rate) responses to the laboratory presentation of mental stressors, decreased vascular compliance and brachial artery endothelial reactivity compared to matched non-ischemic controls; 2) To perform a randomized clinical trial that will examine the effects of 9 months of aerobic exercise training versus usual care on vasoreactivity, vascular compliance and ischemic burden on Holter monitor. Older individuals without a history of overt CAD will be recruited and evaluated for the presence of exercise-induced SI. Baseline cross-sectional comparisons of vasoreactivity and cardiovascular function will be performed between those with SI and non-ischemic controls. The individuals with SI will be enrolled in a randomized clinical trial of exercise vs usual care. Exercise treadmill testing with measurement of maximal aerobic capacity will be used to determine fitness. Vasoactivity will be quantified during a mental stress test with real time 2d echo imaging. Vascular function will be assessed using high frequency ultrasound measurements of flow-mediated brachial artery endothelial reactivity.

Study Type : Interventional  (Clinical Trial)
Allocation: Randomized
Official Title: The Effect of Exercise Training on Mental Stress-Induced Silent Ischemia
Study Start Date : April 1997
Study Completion Date : March 2000

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Ages Eligible for Study:   60 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Older individuals without a history of overt CAD.

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To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00018252

United States, Maryland
VA Maryland Health Care System
Baltimore, Maryland, United States, 21201
Sponsors and Collaborators
VA Office of Research and Development Identifier: NCT00018252     History of Changes
Other Study ID Numbers: AGCG-003-96F
First Posted: July 5, 2001    Key Record Dates
Last Update Posted: January 21, 2009
Last Verified: June 2001

Additional relevant MeSH terms:
Myocardial Ischemia
Coronary Artery Disease
Stress, Psychological
Pathologic Processes
Heart Diseases
Cardiovascular Diseases
Vascular Diseases
Coronary Disease
Arterial Occlusive Diseases
Behavioral Symptoms