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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Hypertension. 2011 Jun 20;58(2):167–175. doi: 10.1161/HYPERTENSIONAHA.111.172262

Table 2.

Blood and Urine Electrodes

Variables Healthy Controls (n=15) POTS Patients
Exercise Training (n=19) Propranolol (n=9) Placebo (n=10)

Pre Post Pre Post Pre Post
Blood
 pH 7.40±0.04 7.40± 0.05 7.39± 0.03 7.39±0.03 7.41±0.04 7.42±0.05 7.44±0.04
 Na+ (mmol/l) 138±1 137±3 138±2 137±2 136±2 138±2 137±2
 K+ (mmol/l) 4.2±0.4 4.3±0.4 4.3±0.3 4.4±0.4 4.2±0.2 4.1±0.5 4.1±0.3
 Ca++ (mmol/l) 1.2±0.1 1.1±0.1 1.1±0.1 1.1±0.1 1.1±0.1 1.1±0.1 1.1±0.1
24-hour Urine Output (ml) 2142±805 2224±1037 2041±873 2088±1218 1690±866 2262±1207 2140±1198
 Osmolality (mOs/kg) 401±152 417±207 437±153 495±293 507±242 398±223 393±154
 pH 6.48±0.26 6.53±0.24 6.53±0.24 6.52±0.31 6.63±0.17 6.47±0.14 6.50±0.36
 Na+ (mmol/24 h) 149±57 158±60 157±61 151±76 149±51 161±70 147±62
 K+ (mmol/24 h) 54±20 59±25 54±26 53±30 52±28 62±27 50±26
 Ca++ (mmol/24 h) 1.6±0.8 1.5±1.0 1.6±1.3 1.1±0.5 1.6±1.1 2.2±1.3 2.2±1.4

Values are mean±standard deviation.