NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Importance of the splanchnic vascular bed in human blood pressure regulation.Three-part experiment in which five subjects were exposed to lower body negative pressure (LBNP) at -50 mm Hg below the iliac crests. Duration of LBNP to earliest vagal symptoms was 7 to 21 min; all data are expressed as changes from control period to the last measurements before these symptoms. In part I, forearm blood flow (by Whitney gauge) fell 45% during LBNP. In part II, splanchnic blood flow (from arterial clearance hepatic extraction of indocyanine green) fell 32% and splanchnic vascular resistance rose 30%. In part III, cardiac output fell 28%, stroke volume 51%, and central blood volume 21%. Total peripheral resistance and heart rate rose 19% and 52%. Of the reduction in total vascular conductance, decreased splanchnic conductance accounted for approximately 33%; skin plus muscle conductance decreased similarly.
Document ID
19720037223
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rowell, L. B.
Detry, J.-M. R.
Blackmon, J. R.
Wyss, C.
(Washington, University Seattle, Wash., United States)
Date Acquired
August 6, 2013
Publication Date
February 1, 1972
Publication Information
Publication: Journal of Applied Physiology
Volume: 32
Subject Category
Biotechnology
Accession Number
72A20889
Funding Number(s)
CONTRACT_GRANT: NGR-48-002-082
CONTRACT_GRANT: NIH-RR-37
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available