Expression of plasma renin activity in terms of urinary sodium excretion and posture in normal subjects on free sodium intake.
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.
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
D012965:Sodium Chloride; D003404:Creatinine; D012083:Renin