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• W1968045158 abstract "We recently reported that arterial baroreflex control of renal nerve traffic is impaired in renal hypertensive rabbits. The purpose of this study was to determine if vagal cardiopulmonary baroreflex control of renal nerve traffic is also impaired. Experiments were performed in 10 hypertensive (mean arterial pressure +/- SE in conscious state, 110 +/- 3 mm Hg) and 10 normotensive (79 +/- 1 mm Hg) chloralose-anesthetized rabbits. Responses to graded blood volume expansion (+5, +10, +15 ml/kg) with dextran in saline were recorded with all baroreflexes intact, after sinoaortic baroreceptor denervation, and after vagotomy. With arterial and cardiopulmonary baroreflexes intact, volume expansion resulted in decreases in renal nerve traffic of -12 +/- 2%/mm Hg increase in left atrial pressure in normotensive rabbits, but of only -5 +/- 2%/mm Hg in the hypertensive rabbits (P less than 0.05). This difference is particularly striking in view of the larger maximum increases in arterial (25 +/- 7 vs. 12 +/- 3 mm Hg) and left atrial pressure (9 +/- 1 vs. 6 +/- 1 mm Hg) during volume expansion in hypertensive vs. normotensive rabbits. After sinoaortic baroreceptor denervation, the responses of normotensive rabbits were preserved (-11 +/- 3%/mm Hg), while those of hypertensive rabbits were impaired further (-2 +/- 1%/mm Hg). Vagotomy abolished responses of renal nerves to volume expansion in both groups. These data demonstrate striking impairment of vagal cardiopulmonary baroreflex control of renal nerve traffic in renal hypertension. Even though arterial baroreflexes have been shown to be abnormal in renal hypertension, they still may partially compensate for markedly impaired cardiopulmonary baroreflex control of the renal nerves." @default.
• W1968045158 created "2016-06-24" @default.
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• W1968045158 date "1985-11-01" @default.
• W1968045158 modified "2023-10-14" @default.
• W1968045158 title "Impaired cardiopulmonary baroreflex control of renal nerves in renal hypertension." @default.
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• W1968045158 doi "https://doi.org/10.1161/01.res.57.5.741" @default.
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