Decreased insulin clearance as a feature of essential hypertension.
1992
Several studies report that essential hypertension is associated with hyperinsulinemia. This condition may depend on enhanced pancreatic insulin secretion and/or a decreased MCR of the circulating hormone. Twenty-five nonobese glucose-normotolerant patients with primary hypertension were divided into 5 groups, each consisting of 5 subjects. Each group was submitted to continuous 120-min double infusion of different doses of insulin (group I, 0.025; II, 0.05; III, 0.1; IV, 0.2; V, 0.4 U/kg.h) and glucose (I, 2; II, 3.5; III, 6; IV, 8; V, 10 mg/kg.min). The same procedures were applied to 25 healthy normotensive volunteers. Basal and steady state plasma levels of glucose, insulin, and C-peptide were significantly (P less than 0.05 or less) higher in hypertensive patients than in control subjects of all groups. The MCR of insulin (milliliters per kg/min) at all insulin-glucose infusion rates was significantly (P less than 0.05 or less) lower in hypertensive than normotensive subjects. Despite the significant...
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