F14 Two different methods to evaluate baroreflex control of muscle sympathetic nerve activity
نویسندگان
چکیده
منابع مشابه
Baroreflex 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 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 ...
متن کاملModulation of arterial baroreflex control of muscle sympathetic nerve activity by muscle metaboreflex in humans.
We aimed to investigate the interaction [with respect to the regulation of muscle sympathetic nerve activity (MSNA) and blood pressure] between the arterial baroreflex and muscle metaboreflex in humans. In 10 healthy subjects who performed a 1-min sustained handgrip exercise at 50% maximal voluntary contraction followed by forearm occlusion, arterial baroreflex control of MSNA (burst incidence ...
متن کاملWhole body heat stress attenuates baroreflex control of muscle sympathetic nerve activity during postexercise muscle ischemia.
Both whole body heat stress and stimulation of muscle metabolic receptors activate muscle sympathetic nerve activity (MSNA) through nonbaroreflex pathways. In addition to stimulating muscle metaboreceptors, exercise has the potential to increase internal temperature. Although we and others report that passive whole body heating does not alter the gain of the arterial baroreflex, it is unknown w...
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 ...
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ژورنال
عنوان ژورنال: American Journal of Hypertension
سال: 1997
ISSN: 0895-7061
DOI: 10.1016/s0895-7061(97)89299-0