[The comparative characteristics of the arterial pressure changes in hypertensive and normotensive rats during heat exposure].
The 40 degrees C heating induced an increase in systolic, diastolic, average and pulse pressure at rectal temperature raised to 40 degrees C. Further growth of the body temperature was accompanied by a decrease in the above parameters. More obvious changes of the main pressure characteristics in overheating were found in spontaneously hypertensive rats as compared with normotensive ones. Adaptive mechanism for heating seems to be less flexible in spontaneously hypertensive rats. A certain role in the genesis of faster overheating of hypertonic rats is, probably, played by the differences in energy expenditure for the blood circulation in conditions of high and low vascular resistance.
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D000818:Animals; D001794:Blood Pressure / Q000502:physiology*; D001795:Blood Pressure Determination / Q000379:methods; D001831:Body Temperature / Q000502:physiology; D003971:Diastole / Q000502:physiology; D006358:Hot Temperature / Q000009:adverse effects*; D011674:Pulse / Q000502:physiology; D051381:Rats; D011918:Rats, Inbred SHR / Q000502:physiology*; D011921:Rats, Inbred WKY; D012007:Rectum; D013599:Systole / Q000502:physiology
Sravnitel'naia kharakteristika izmeneniĭ arterial'nogo davleniia u gipertenzivnykh i normotenzivnykh krys pri teplovom vozdeĭstvii.