Myogenic adaptation of rabbit ear arteries to pulsatile internal pressures.
نویسندگان
چکیده
منابع مشابه
High levels of myogenic tone antagonize the dilator response to flow of small rabbit cerebral arteries.
BACKGROUND AND PURPOSE Pressure and shear stress exerted by flowing blood are two mechanical forces that play a major role in the regulation of vascular tone. We sought to evaluate the interaction between pressure and flow in isolated rabbit cerebral arteries. METHODS Responses to intraluminal flow of isolated pressurized rabbit posterior cerebral arteries were investigated at low, medium, an...
متن کاملStructure and adaptation of arteries to pulsatile flow: the case of the ascending aorta.
PURPOSE The objectives are: (i) assess the development of the impedance of some arteries during the first decades of life; (ii) determine the influence of pulse rate in arterial impedance; (iii) compare the structure of some arterial segments with optimized structures with respect to blood flow; and (iv) explain the elongation of the ascending aorta throughout life in healthy subjects. METHOD...
متن کاملCardiovascular responses to various pulsatile pressures in the carotid sinus.
SCHMIDT,ROBERT M., MAMORUKUMADA,AND KIICHI SAGAWA. Curdiovascular responses to various pulsatile pressures in the carotid sinus. Am. J. Physiol. 223 (1): l-7. 1972.-To extend the knowledge of the carotid sinus reflex, we forced the isolated sinuses of anesthetized dogs with sinusoidal (pulsatile) pressures using multiple combinations of mean level, amplitude, and frequency of pulsation. The ref...
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Cerebral artery vasospasm is a major cause of death and disability in patients experiencing subarachnoid hemorrhage (SAH). Currently, little is known regarding the impact of SAH on small diameter (100-200 microm) cerebral arteries, which play an important role in the autoregulation of cerebral blood flow. With the use of a rabbit SAH model and in vitro video microscopy, cerebral artery diameter...
متن کاملDifferential actions of charybdotoxin on central and daughter branch arteries of the rabbit isolated ear.
1. By use of rabbit isolated perfused intact ears and isolated perfused segments of central and first generation daughter branch ear arteries, we investigated the actions of charybdotoxin (ChTX), a blocker of calcium-activated K+ channels (KCa channels), and N omega-nitro-L-arginine methyl ester (L-NAME) on pressure-flow and diameter-flow relationships. 2. ChTX (1 nM) induced an upwards shift i...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1987
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1987.sp016740