Effects of dietary sodium intake on blood pressure measurements in partially nephrectomized dogs.
Systolic, diastolic, and mean arterial blood pressure were measured by femoral artery puncture every other day in 2 groups (n = 4) of partially nephrectomized (approx 75%) dogs fed 2 concentrations of dietary sodium beginning 9 weeks after partial nephrectomy was completed. In a double crossover design, dogs were fed a low-sodium (0.18% sodium on a dry-weight basis) or high-sodium (1.3% sodium on a dry-weight basis) diet in 2 sequences (L/H/L or H/L/H) for 3 consecutive 4-week observation periods. Significant effect of sequence was found in dogs fed the L/H/L sequence, compared with those fed the H/L/H sequence. Systolic blood pressure was significantly (P < 0.05) increased in dogs fed the L/H/L sequence (175 +/- 16 mm of Hg), compared with dogs fed the H/L/H sequence (156 +/- 14 mm of Hg). Mean arterial blood pressure was higher, but not significantly different, for the L/H/L sequence (116 +/- 8 mm of Hg) vs the H/L/H sequence (109 +/- 6 mm of Hg). Significant difference in diastolic pressure was not observed between the L/H/L (86 +/- 10 mm of Hg) and H/L/H (86 +/- 10 mm of Hg) sequences. Restricted sodium intake (0.18% sodium on a dry-weight basis) was associated with moderate systolic hypertension in dogs with experimentally induced chronic renal disease. Acute fluctuations in dietary sodium intake had no apparent immediate effect on blood pressure in dogs with this mild to moderate degree of renal dysfunction.
Greco
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Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Science, Colorado State University, Fort Collins 80523.
Lees
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Dzendzel
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Carter
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D000818:Animals; D001794:Blood Pressure / Q000187:drug effects / Q000502:physiology*; D003971:Diastole / Q000187:drug effects / Q000502:physiology; D004039:Diet, Sodium-Restricted; D004285:Dogs; D005260:Female; D008297:Male; D009392:Nephrectomy / Q000662:veterinary; D012982:Sodium, Dietary / Q000494:pharmacology*; D013599:Systole / Q000187:drug effects / Q000502:physiology; D013997:Time Factors
D012982:Sodium, Dietary