نتایج جستجو برای: vasoconstriction
تعداد نتایج: 8809 فیلتر نتایج به سال:
Koichi Morita, Hidezo Mori, Katsuhiko Tsujioka, Akihiro Kimura, Yasuo Ogasawara, Masami Goto, Osamu Hiramatsu, Fumihiko Kajiya, and Eric O. Feigl. a-Adrenergic vasoconstriction reduces systolic retrograde coronary blood flow. Am. J. Physiol. 273 (Heart Circ. Physiol. 42): H2746–H2755, 1997.—There is a paradoxical a-adrenoceptor-mediated coronary vasoconstriction whenever there is adrenergic act...
The present renal hemodynamic study tested the hypothesis that CD38 and superoxide anion (O2(·-)) participate in the vasoconstriction produced by activation of thromboxane prostanoid (TP) receptors in the mouse kidney. CD38 is the major mammalian ADP-ribosyl cyclase contributing to vasomotor tone through the generation of cADP-ribose, a second messenger that activates ryanodine receptors to rel...
BACKGROUND The authors tested the hypothesis that ketamine and propofol anesthesia would alter the magnitude of hypoxic pulmonary vasoconstriction compared with the conscious state. In addition, they assessed the extent to which cyclooxygenase pathway inhibition and adenosine triphosphate-sensitive potassium channel inhibition modulate hypoxic pulmonary vasoconstriction in the conscious state, ...
Previous work indicates that sympathetic nerves participate in the vascular responses to direct cooling of the skin in humans. We evaluated this hypothesis further in a four-part series by measuring changes in cutaneous vascular conductance (CVC) from forearm skin locally cooled from 34 to 29 degrees C for 30 min. In part 1, bretylium tosylate reversed the initial vasoconstriction (-14 +/- 6.6%...
The aim of the present study was to determine the role of endothelium and superoxide in the responses of isolated mouse coronary arteries to hypoxia-reoxygenation. Isolated mouse coronary artery was cannulated, pressurized at 60 mmHg, and constantly superfused with recirculating Krebs-Ringer bicarbonate solution for continuous measurement of intraluminal diameter (ID) by video microscopy. Under...
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