| Systolic time intervals during combined hand cooling and head-up tilt. | |
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MedLine Citation:
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PMID: 454319 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cardiac effects initiated by hand cooling and head-up tilt, separately and in combination, were studied in human subjects. Systolic and diastolic arterial pressures, heart rate, pre-ejection period (PEP), and left ventricular ejection time (LVET) were measured while subjects were resting supine, supine with hand immersed in 10 degrees C water, tilted 70 degrees head up, and hand immersed during head-up tilt. Hand immersion and head-up tilt individually increased diastolic blood pressure and concomitantly increased the duration of PEP. During the combined maneuver, the increase in diastolic pressure was greater than observed during either separate maneuver; however, the combined maneuver had no comparable summative effect on PEP prolongation. An interaction appears to occur during the combined maneuver which counteracts the Frank/Starling effect on PEP due to decreased venous return during head-up tilt. |
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Authors:
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M A Frey; R A Kenney |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Aviation, space, and environmental medicine Volume: 50 ISSN: 0095-6562 ISO Abbreviation: Aviat Space Environ Med Publication Date: 1979 Mar |
Date Detail:
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Created Date: 1979-08-16 Completed Date: 1979-08-16 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 7501714 Medline TA: Aviat Space Environ Med Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 218-22 Citation Subset: IM; S |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Blood Pressure Cardiac Output Carotid Arteries / physiology Cold Temperature* Electrocardiography Female Hand* Heart Rate Humans Immersion Male Middle Aged Myocardial Contraction* Phonocardiography Posture* Pulse Systole* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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