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- W2046931676 abstract "It has been postulated that glomerular capillary pressure is elevated in sodium-sensitive types of hypertension. In addition, the presence or absence of renal function reserve, in response to a chronic protein load, is thought to be useful in predicting the existence of glomerular hypertension. Intrarenal hemodynamic parameters in the sodium-sensitive type of essential hypertension were therefore calculated by analyzing the pressure-natriuresis curve, and the preservation of renal function reserve was evaluated. Fifteen patients with essential hypertension were maintained on a normal sodium diet for 1 week and a low-sodium diet for a second week in study 1. This protocol was repeated for low and high protein intake in 8 patients in study 2. Subjects in study 1 whose mean arterial pressure was reduced by more than 10% by sodium restriction were considered sodium sensitive (n = 7), with the remaining patients classified as non-sodium sensitive (n = 8). There were no significant differences in mean arterial pressure (125 ± 2 mm Hg), glomerular filtration rate (80 ± 3 ml/min), or renal plasma flow rate (355 ± 24 ml/min) on the normal sodium diet between sodium-sensitive and non-sodium-sensitive patients. Glomerular capillary pressure (59 ± 2 mm Hg vs 47 ± 1 mm Hg, p < 0.0002) was estimated to be elevated in sodium-sensitive patients relative to that in non-sodium-sensitive patients, whereas the whole kidney ultrafiltration coefficient of glomerular capillary walls (0.068 ± 0.009 (ml/sec)/mm Hg vs 0.221 ± 0.042 (ml/sec)/mm Hg, p < 0.005) was decreased. Chronic protein loading increased both glomerular filtration and renal plasma flow rates in study 2. Although the sodium sensitivity of blood pressure showed no significant correlation with the increase in either glomerular filtration or renal plasma flow rate, it showed a weak negative correlation with the increase in filtration fraction (r = -0.69, p < 0.06), which is the ratio of the two rates. Taken together, these results suggest that glomerular capillary pressure is elevated and renal function reserve is impaired in patients with sodium-sensitive essential hypertension." @default.
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- W2046931676 date "1996-07-01" @default.
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- W2046931676 title "Renal function reserve and sodium sensitivity in essential hypertension" @default.
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- W2046931676 doi "https://doi.org/10.1016/s0022-2143(96)90117-1" @default.
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