Baroreflex Control of Sympathetic Nerve Activity in Essential and Secondary Hypertension
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چکیده
منابع مشابه
Baroreflex control of sympathetic nerve activity in essential and secondary hypertension.
Studies performed in experimental animals and in humans have documented that high blood pressure markedly impairs baroreceptor control of heart rate. Whether a similar impairment also characterizes baroreceptor control of sympathetic activity modulating peripheral vasomotor tone is still unknown. In 28 untreated essential hypertensive subjects [14 of moderate and 14 of more severe degree, age 5...
متن کاملBaroreflex control of muscle sympathetic nerve activity in borderline hypertension.
Patients with borderline hypertension have exaggerated vascular responses to orthostatic stress produced by tilt or lower body negative pressure (LBNP). It has been suggested that 1) in the supine position, these patients have augmented activity of cardiopulmonary baroreceptors that exerts an increased restraint on sympathetic vasoconstrictor tone; 2) withdrawal of this augmented inhibitory bar...
متن کاملBaroreflex control of sympathetic activity in experimental hypertension.
The arterial baroreceptor reflex system is one of the most powerful and rapidly acting mechanisms for controlling arterial pressure. The purpose of the present review is to discuss data relating sympathetic activity to the baroreflex control of arterial pressure in two different experimental models: neurogenic hypertension by sinoaortic denervation (SAD) and high-renin hypertension by total aor...
متن کاملGlucocorticoids modulate baroreflex control of renal sympathetic nerve activity.
Experiments were performed to determine the effects of glucocorticoids on arterial baroreceptor reflex control of renal sympathetic nerve activity (RSNA). Intravenous infusions of phenylephrine and nitroprusside were used to produce graded changes in arterial pressure (AP) in Inactin-anesthetized male Sprague-Dawley rats. Baroreflex control of RSNA was determined during a baseline period and 2 ...
متن کاملBaroreflex control of muscle sympathetic nerve activity: a nonpharmacological measure of baroreflex sensitivity.
The sensitivity of baroreflex control of sympathetic nerve activity (SNA) represents the responsiveness of SNA to changes in blood pressure. In a slightly different analysis, the baroreflex threshold measures the probability of whether a sympathetic burst will occur at a given diastolic blood pressure. We hypothesized that baroreflex threshold analysis could be used to estimate the sensitivity ...
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ژورنال
عنوان ژورنال: Hypertension
سال: 1998
ISSN: 0194-911X,1524-4563
DOI: 10.1161/01.hyp.31.1.68