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CARDIOVASCULAR PARAMETERS IN SHORN SHEEP PRIOR TO AND DURING THEIR EXPOSURE TO A COLD, WET ENVIRONMENT
Author(s) -
Panaretto B. A.,
Vickery Marion R.
Publication year - 1971
Publication title -
quarterly journal of experimental physiology and cognate medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0033-5541
DOI - 10.1113/expphysiol.1971.sp002103
Subject(s) - rectal temperature , cardiac output , heart rate , zoology , medicine , cardiology , biology , hemodynamics , blood pressure
When shorn sheep were exposed to ambient temperatures of 3°C and the residual fleece was wetted, heart rate and cardiac output increased substantially above levels measured during a control period at 25°C. With continued cold exposure and wetting the sheep become hypothermic and heart rate and cardiac output decreased. In most sheep at rectal temperature 〈32°C cardiac output had fallen below control values while heart rate remained above control. In a minority of hypothermic sheep cardiac output remained above control rates.