Dietary Potassium Attenuates the Effects of Dietary Sodium on Vascular Function in Salt-Resistant Adults

Figures

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  Figure 1. (a) Mean arterial pressure (MAP) on the last day of each diet. (b) Urinary sodium excretion increased on the high sodium diets compared to low sodium. (c) Urinary potassium excretion was elevated on the high potassium diet compared to the moderate potassium diets, however there was a difference in potassium excretion between the high and low sodium diets. HK/HS, high potassium/high sodium; MK/HS, moderate potassium/high sodium; MK/LS, moderate potassium/low sodium. Values are mean ± SE; * p < 0.05 vs. MK/LS; † p < 0.05 vs. MK/HS.

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  Figure 2. (a) Plasma renin activity (PRA) was suppressed on the high sodium diets. (b) Aldosterone (ALDO) levels were elevated on the MK/LS and HK/HS diets relative to MK/HS. (c) Angiotensin II levels were not significantly different between the three diets. HK/HS, high potassium/high sodium; MK/HS, moderate potassium/high sodium; MK/LS, moderate potassium/low sodium. Values are mean ± SE. * p < 0.05 vs. MK/LS; † p < 0.05 vs. MK/HS.

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  Figure 3. (a) Group brachial artery flow-mediated dilation (FMD) responses during the three diets. (b) Individual FMD responses during the three diets. Values are mean ± SE. FMD, flow-mediated dilation; HK/HS, high potassium/high sodium; MK/HS, moderate potassium/high sodium; MK/LS, moderate potassium/low sodium. * p < 0.05 vs. MK/HS.

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  Figure 4. (a) Augmentation index (AIx) was unaltered over the three diets. (b) Pulse wave velocity (PWV) remained unchanged over the three diets. Values are mean ± SE. HK/HS, high potassium/high sodium; MK/HS, moderate potassium/high sodium; MK/LS, moderate potassium/low sodium.