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Hypertension, Vol 5, 790-795, Copyright © 1983 by American Heart Association

ARTICLES

Blood pressure response to dietary sodium restriction in normotensive adults

JZ Miller, SA Daugherty, MH Weinberger, CE Grim, JC Christian and CL Lang

Sixteen healthy, normotensive husband-wife pairs participated in a study to investigate the effect of reduction of dietary sodium intake (goal less than or equal to 60 mEq/day) on blood pressure. Sodium excretion decreased from a control average of 152.7 +/- 10.1 (SE) mEq/day to 69.5 +/- 4.5 mEq/day (p less than 0.001). Results indicated significant decreases in both systolic (p less than 0.001) and diastolic (p less than 0.001) blood pressure after a period of sodium restriction. In the entire group, there was no significant change in potassium excretion (58.4 +/- 3.2 vs 54.6 +/- 3.5 mEq/day) or body weight (76.0 +/- 2.8 vs 75.3 +/- 2.7 kg). Although there was variability in the blood pressure response, the decrease in blood pressure was significantly correlated with the magnitude of sodium restriction (r = 0.36, p less than 0.03). These results indicate that the blood pressure response to sodium restriction may not be limited to individuals with hypertension and that the response is heterogeneous in normotensive subjects.

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