نتایج جستجو برای: baroreflex
تعداد نتایج: 4353 فیلتر نتایج به سال:
Introduction: The bed nucleus of the stria terminalis (BST) is a limbic structure which is involved in cardiovascular regulation and baroreflex modulation. The presence of cholinergic synaptic terminalis with high level of muscarinic receptors in the BST has been demonstrated. This study was performed to find the role of the cholinergic muscarinic receptor in cardiovascular response and baro...
introduction: the bed nucleus of the stria terminalis (bst) is a limbic structure which is involved in cardiovascular regulation and baroreflex modulation. the presence of cholinergic synaptic terminalis with high level of muscarinic receptors in the bst has been demonstrated. this study was performed to find the role of the cholinergic muscarinic receptor in cardiovascular response and baroref...
Background: Epidemiological studies suggested that incidence of cardiovascular diseases in menopause women is more than their nonmenopausal period. The cardioprotective role of estrogen may be responsible for some of these effects. In the present study we evaluated the role of female sex hormones on baroreflex sensitivity in acute hypertension state of rat. Materials and Methods: This was an...
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introduction: cisplatin (cp) therapy may disturb cardiovascular system control. the objective of this study was to find baroreflex sensitivity (brs) in cp-induced nephrotoxicity in rats. materials and methods: eighteen male and female wistar rats were randomly assigned to two groups treated with cp (2.5 mg/kg/day) and the vehicle, for five consecutive days, and then were subjected to surgical p...
The previous studies have shown that the endogenous opiate system depress the baroreflex sensitivity in morphine dependent persons. Nucleus Tractus Soloitarii(NTS) is the main termination site of baroreceptor afferent neurons. The aim of this study was to determine the role of electrical stimulation of Nucleus Tractus Soloitarii on baroreflex sensitivity in morphine...
Previous studies showed that a proportion of normotensive Sprague-Dawley rats spontaneously exhibit lower baroreflex sensitivity. However, investigations have not yet been carried out on Wistar rats. We aimed to compare baroreflex sensitivity among rats from the same strain and the same laboratory. Male Wistar normotensive rats (300-400g) were studied. Cannulas were inserted into the abdominal ...
OBJECTIVES A subset of normotensive Sprague-Dawley rats show lower baroreflex sensitivity; however, no previous study investigated whether there are differences in baroreflex sensitivity within this subset. Our study compared baroreflex sensitivity among conscious rats of this specific subtype. METHODS Male Wistar Kyoto (WKY) rats (16 weeks old) were studied. Cannulas were inserted into the a...
BACKGROUND The overall effect of vasoactive drugs on blood pressure is determined by a combination of the direct effect on vascular tone and an indirect baroreflex-mediated effect, a baroreflex buffering of blood pressure. Differences in baroreflex function affect the responsiveness to vasoactive medications, particularly baroreflex buffering of blood pressure; however, the magnitude is not kno...
Spontaneously occurring, parallel fluctuations in arterial pressure and heart period are frequently used as indices of baroreflex function. Despite the convenience of spontaneous indices, their relation to the arterial baroreflex remains unclear. Therefore, in 97 volunteers, we derived 5 proposed indices (sequence method, alpha-index, transfer function, low-frequency transfer function, and impu...
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