1. Levels of dietary sodium intake: diverging associations with arterial stiffness and atheromatosis
- Author
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Vicky Tzelefa, Kalliopi Karatzi, Athanase D. Protogerou, Maria Yannakoulia, Fotini Chalkidou, Antonios Argyris, Christiana Tsirimiagkou, and Petros P. Sfikakis
- Subjects
medicine.medical_specialty ,030204 cardiovascular system & hematology ,Atheromatosis ,03 medical and health sciences ,0302 clinical medicine ,Dietary Sodium ,Internal medicine ,Epidemiology ,medicine ,Diseases of the circulatory (Cardiovascular) system ,030212 general & internal medicine ,Pulse wave velocity ,business.industry ,Cardiovascular disease ,medicine.disease ,Arterial stiffness ,Dietary sodium ,Plaques ,Quartile ,RC666-701 ,Cohort ,Cardiology ,Animal studies ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background Recent epidemiological evidence suggests a J-shaped, rather than the classical linear, association between dietary sodium (Na) intake and cardiovascular (CV) disease. Numerous animal studies have shown the acceleration of atheromatosis in a low-salt diet but data in humans are scarce. Our aim was to test the hypothesis that in a cohort of patients who are CV-free, yet at increased CV risk, moderate Na intake is associated with lower prevalence of atheromatosis and arterial stiffening than those at very low Na intake. Methods Two 24-h dietary recalls were conducted to estimate Na intake. Atheromatosis (carotid and femoral plaques) was assessed by B-mode ultrasonography and arterial stiffness through tonometry (carotid-to-femoral pulse wave velocity, cf-PWV). Results In 901 individuals (age: 52.4 ± 13.8 years, 45.2% males), only females at 3rd and 4th quartile of total Na intake (derived from food and discretionary salt) had significantly lower probability to present femoral plaques than those at 1st quartile (751.0 ± 215.5 mg/day), even in the full-adjusted model [0.462(0.229-0.935) and p = 0.032 3rd quartile; 0.274(0.118-0.638) and p = 0.003 4th quartile]. On the contrary, male and female individuals at 3rd quartile had significantly higher probability to present arterial stiffness (PWV >10 m/s) than those at 1st quartile [1.991(1.047-3.785) and p = 0.036]. Conclusions Overall, the present data suggest that very low Na intake is associated with: a) accelerated atheromatosis, verifying findings from animal models, and providing a possible explanation of the modern epidemiology and b) lower arterial stiffness, which is in line with previous human findings, therefore suggesting a diverging effect of Na in the two major arterial pathologies.
- Published
- 2021
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