title: Expression of plasma renin activity in terms of urinary sodium excretion and posture in normal subjects on free sodium intake.
abstract: Supine and upright plasma renin activities (PRA) were measured in 151 normal subjects on free sodium intake. Supine and upright plasma renin activities were then related to the 24-hour urinary sodium or the 2-hour urinary sodium excretion, measured in the morning after overnight fasting. Urinary sodium excretion was expressed as the urinary rate per hour or as the urinary Na/creatinine ratio. Correlations were found between both supine and upright PRA and 2 h urinary sodium excretion expressed as the Na/creatinine ratio. Supine and upright PRA values are expressed in terms of these correlations with confidence intervals.
mesh_terms: D000328:Adult; D000368:Aged; D003404:Creatinine / Q000652:urine; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009318:Natriuresis; D011187:Posture; D012083:Renin / Q000097:blood*; D012965:Sodium Chloride / Q000008:administration & dosage*; D013997:Time Factors
chemical_list: D012965:Sodium Chloride; D003404:Creatinine; D012083:Renin