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EXPERIMENT INFORMATION

Vectorcardiographic Results From Skylab Medical Experiment M092: Lower Body Negative Pressure (M092)
Principal Investigator
Research Area:
Cardiovascular physiology
Species Studied
Scientific Name: Homo sapiens Species: Human

Description
OBJECTIVES:
Medical tests conducted on Apollo and Gemini crewmen amply demonstrated the diminished ability of the cardiovascular system to function effectively against gravitational stress following exposure to weightlessness. A reduction in orthostatic tolerance as reflected by increases in heart rate and decreases in pulse pressure was evident in virtually all crewmen tested. The concern for postflight orthostatic intolerance provided the rationale for conducting the Skylab Lower Body Negative Pressure (LBNP) experiment M092. The objectives of this experiment were: (i) to determine the extent and the time course of changes in orthostatic tolerance during weightlessness, and (ii) to use inflight data for predicting the degree of postflight orthostatic intolerance.


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Publications
Bergman SA, Hoffler GW, Johnson RL, Wolthuis RA. Pre- and postflight systolic time intervals during LBNP: the second manned Skylab mission. Aviation, Space, and Environmental Medicine. 1976; 47(4):359-362.[pubmed.gov]

Hoffler GW, Johnson RL, Nicogossian AE, Bergman SA, Jackson MM. Vectorcardiographic results from Skylab medical experiment M092: Lower Body Negative Pressure. NASA document 1974; 597-621.

Hoffler WG, Johnson RL, Nicogossian AE, Bergman SA, Jackson MM. Vectorcardiographic Results From Skylab Medical Experiment M092: Lower Body Negative Pressure. In: Johnston RS, Dietlein LF, eds. Biomedical Results from Skylab. Washington, DC: NASA Headquarters; 1977. NASA SP-377. [NTRS]

Johnson RL, Hoffler GW, Nicogossian A, Bergman SA Jr. Skylab experiment M-092: results of the first manned mission. Acta Astronautica. 1975. Mar-Apr;2(3-4):265-96. [pubmed.gov]

Johnson RL, Hoffler GW, Nicogossian A, Bergman SA. Skylab experiment M092: results of the first manned mission. Proceedings of the Fifth International Symposium on Basic Environmental Problems of Man in Space; 1973 November 27-30; Washington DC.

Johnson RL, Hoffler GW, Nicogossian AE, Bergman SA, Jackson MM. Lower body negative pressure: second manned Skylab mission. NASA document 1974; 545-595.[pubmed.gov]

Johnson RL, Nicogossian AE, Bergman SA, Hoffler GW. Lower body negative pressure: the second manned Skylab mission. Aviation, Space, and Environmental Medicine. 1976; April; 47(4): 347-353. [pubmed.gov]

Keywords
Vectorcardiography
Lower body negative pressure (LBNP)
Hemodynamics
Orthostatic intolerance

Data Information
Data Availability
Archive is complete. Data sets are not publicly available but can be requested.
Data Sets+ Request data

Parameters
Ambient pressure
Ambient temperature, begin
Ambient temperature, end
Azimuth of J-vector
Azimuth of P-wave vector maximum
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Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Skylab 2 05/25/1973 06/22/1973 28 days
Skylab 3 07/28/1973 09/25/1973 59.5 days
Skylab 4 11/16/1973 02/08/1974 84 days

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Eric Gallagher
Institutional Support
National Aeronautics and Space Administration (NASA)