[The effect of arterial pressure pulsations on the resistive function of the vessels in different organs and species and with differing initial tonus].
In normotensive rabbits, normo- and hypertensive rats, an increase of the pulse amplitudes from 0-10 to 70-80 mm Hg at a constant value of the mean pressure in magistral arteries in the skeletal muscles and skin, induced a decrease of the resistance against blood flow due to occurring vasodilation. The response in the SHR was considerably lesser than in normotensive animals. The vasodilation occurring in some organs and tissues to dynamic deformation of the blood vessels by the pulse pressure seems to play a significant role in the adaptive responses of the circulation system to ambient stimuli activating the heart output. This response seems to be weakened under conditions of developed arterial hypertension.
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D000818:Animals; D001794:Blood Pressure / Q000502:physiology*; D006973:Hypertension / Q000503:physiopathology; D008833:Microcirculation / Q000502:physiology; D009132:Muscles / Q000098:blood supply; D011673:Pulsatile Flow / Q000502:physiology*; D011817:Rabbits; D051381:Rats; D011918:Rats, Inbred SHR; D011921:Rats, Inbred WKY; D012867:Skin / Q000098:blood supply; D013045:Species Specificity; D014655:Vascular Resistance / Q000502:physiology*; D014664:Vasodilation / Q000502:physiology
Vliianie pul'satsiĭ arterial'nogo davleniia na rezistivnuiu funktsiiu sosudov raznoĭ organnoĭ i vidovoĭ prinadlezhnosti i s raznym iskhodnym tonusom.