Arterial baroreflex control of sympathetic vasoconstrictor traffic and orthostatic intolerance after head-down bed rest.

A. Kamiya, D. Michikami, Qi Fu, Y. Niimi, S. Iwase, T. Mano

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5 Citations (Scopus)

Abstract

The purpose of the present study is to examine the changes in the arterial baroreflex control of muscle sympathetic nerve activity (MSNA) after head-down bed rest (HDBR), in relation to orthostatic hypotension after HDBR. Therefore, we performed 60 degrees head-up tilt (HUT) tests before and after 14 days of HDBR, with monitoring MSNA, heart rate and blood pressure. We calculated the gain of the arterial baroreflex control of MSNA, and compared the gains between the subjects who did (defined as the fainters) and those who did not (defined as the nonfainters) become presyncopal in HUT tests after HDBR.

Original languageEnglish (US)
JournalJournal of gravitational physiology : a journal of the International Society for Gravitational Physiology
Volume7
Issue number2
StatePublished - 2000

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Orthostatic Intolerance
Bed Rest
Baroreflex
Vasoconstrictor Agents
Head
Muscles
Orthostatic Hypotension
Heart Rate
Blood Pressure

Cite this

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AU - Kamiya, A.

AU - Michikami, D.

AU - Fu, Qi

AU - Niimi, Y.

AU - Iwase, S.

AU - Mano, T.

PY - 2000

Y1 - 2000

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AB - The purpose of the present study is to examine the changes in the arterial baroreflex control of muscle sympathetic nerve activity (MSNA) after head-down bed rest (HDBR), in relation to orthostatic hypotension after HDBR. Therefore, we performed 60 degrees head-up tilt (HUT) tests before and after 14 days of HDBR, with monitoring MSNA, heart rate and blood pressure. We calculated the gain of the arterial baroreflex control of MSNA, and compared the gains between the subjects who did (defined as the fainters) and those who did not (defined as the nonfainters) become presyncopal in HUT tests after HDBR.

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