Echocardiographic Assessment of Cardiovascular Changes in Long Term Space Flight
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|ClinicalTrials.gov Identifier: NCT00598598|
Recruitment Status : Terminated (funding issues)
First Posted : January 22, 2008
Last Update Posted : January 12, 2017
The National Space Biomedical Research Institute is interested in learning more about heart function in space. One potential problem with long duration, manned space flight is muscle loss- including loss of heart muscle. One goal of our research is to help identify why this muscle loss occurs. We are interested in patients undergoing aortic valve surgery because this procedure is performed to correct a problem with the valve that may also change heart function. This change in heart function may provide information that is useful in understanding and potentially preventing the loss of cardiac muscle in space.
Three patient groups will be studied, patients having surgery for aortic regurgitation, aortic stenosis, and coronary bypass. We are planing to perform this study on 30 patients, 10 in each group.
The aim of this study is to continue our ongoing study of the magnitude and predictors of the changes in size of the left ventricle following acute volume and pressure unloading as a ground-based analog for manned space flight.
|Condition or disease|
|Aortic Valve Insufficiency Aortic Valve Stenosis|
Among the most serious of the risks identified by NASA in the area of cardiovascular alterations are serious dysrhythmias and the development of orthostatic intolerance. Prolonged exposure to microgravity may lead to a reduction in cardiac performance, particularly during times of stress and that undiagnosed cardiovascular disease may manifest during long missions. The PI and colleagues have worked closely with NASA and NSBRI over the last six years to optimize use of ultrasound in the space program as an investigative modality, addressing fundamental cardiovascular problems in need of countermeasures development. We propose the following specific aim:
To continue our ongoing study of the magnitude and predictors of LV mass regression following acute volume and pressure unloading as a ground-based analog for manned spaceflight. This work will continue to focus on patients undergoing aortic valve surgery, but exploit recent knowledge of the roles of cytokines and integrins involved in cardiac hypertrophy and regression as well as emerging technologies such as gene chip analysis.
This work will be closely focused on risks and critical questions identified by the Cardiovascular Alterations Team as described in the Bioastronautics Critical Path Road Map Baseline Document. If successful, this project will enhance assessment of cardiac function during long duration missions and potentially suggest cytokine promoters or signal transduction pathways that could be targeted for cardiac atrophy countermeasures. In addition, we will continue to provide the facilities of our Core laboratory for access by investigators throughout the NASA and NSBRI programs in need of assistance in acquiring or analyzing ultrasonic data.
|Study Type :||Observational|
|Actual Enrollment :||1 participants|
|Official Title:||Echocardiographic Assessment of Cardiovascular Adaptation and Counter Measures n Microgravity|
|Study Start Date :||October 2003|
|Actual Primary Completion Date :||June 2008|
|Actual Study Completion Date :||July 2008|
- Diagnostic 2D and 3D echocardiography [ Time Frame: 6-12 months ]
- Endogenous gene expression [ Time Frame: 1 week ]
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 ClinicalTrials.gov identifier (NCT number): NCT00598598
|United States, Ohio|
|Cleveland, Ohio, United States, 44195|
|Principal Investigator:||Jim Thomas, MD||The Cleveland Clinic|