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The Effect of Long-Term Microgravity Exposure on Cardiac Autonomic Function by Analyzing 24-hours Electrocardiogram (Biorhythms)
Principal Investigator
Research Area:
Cardiovascular physiology
Species Studied
Scientific Name: Homo sapiens Species: Human

It has been demonstrated that space flight induces adverse consequences such as cardiovascular deconditioning and sleep disturbances which may be accompanied by disruption in circadian rhythms. As those consequences are closely related to autonomic function, cardiac autonomic function may be changed during long term space flight. The objective of this study is to examine the effect of long-term microgravity exposure on cardiac autonomic function by monitoring pre-, in-, and postflight electrocardiograms recorded for a 24-hour period. Electrocardiograms will be collected using the Digital Holter ECG. The results will be analyzed for improving crew health care technology in long-duration space flight.

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Data Information
Data Availability
Archive is complete. No data sets are available for this experiment. Please Contact LSDA if you know of available data for this investigation.

Cardiac autonomic function
Circadian rhythm

Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Expedition 19 03/26/2009 10/11/2009 199 days
Expedition 20 05/27/2009 10/11/2009 137 days
Expedition 21 10/11/2009 12/01/2009 51 days
Expedition 22 11/30/2009 03/18/2010 109 days
Expedition 23 03/18/2010 06/01/2010 75 days
Expedition 24 06/01/2010 09/25/2010 117 days
Expedition 25 09/24/2010 11/25/2010 31 days
Expedition 26 11/26/2010 03/16/2011 111 days
Expedition 27 03/14/2011 05/23/2011 70 days
Expedition 28 05/23/2011 09/15/2011 115 days
Expedition 29 09/16/2011 11/21/2011 40 days
Expedition 32 07/01/2012 09/16/2012 78 days

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Jessica Keune
Institutional Support
Japan Aerospace Exploration Agency (JAXA)