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Extended duration orbiter medical project variability of blood pressure and heart rate (STS-50/USML-1)Decreases in arterial baroreflex function after space flight may be related to changes in blood pressure and heart rate patterns during flight. Ambulatory blood pressure and heart rate were measured for 24 hours, in fourteen astronauts on two occasions before flight, two to three occasions in flight, and 2 days after landing on Shuttle missions lasting 4 to 14 days. Blood pressure and heart rate were recorded every 20minutes during awake periods and every 30 minutes during sleep. In pre- and postflight studies, the 24-hour ambulatory measurements were followed by studies of carotid baroreceptor-cardiac reflex responses. Carotid baroreceptors were stimulated using a sequence of neck pressure and suction from +40 to -65 mmHg.
Document ID
19950007809
Document Type
Conference Paper
Authors
Fritsch-Yelle, Janice M. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Charles, John B. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Boettcher, Sheila W. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1994
Publication Information
Publication: NASA. Marshall Space Flight Center, Joint Launch + One Year Science Review of USML-1 and USMP-1 with the Microgravity Measurement Group
Subject Category
AEROSPACE MEDICINE
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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