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- Title
Assessment of salt sensitivity in essential hypertension by 24-h ambulatory blood pressure monitoring<sup>*</sup>.
- Authors
de la Sierra, Alejandro; del Mar Lluch, María; Coca, Antonio; Aguilera, María Teresa; Sánchez, Miguel; Sierra, Cristina; Urbano-Márquez, Alvaro
- Abstract
We used ambulatory blood pressure monitoring (ABPM) in the assessment of salt sensitivity in 40 essential hypertensive patients, comparing 24-h mean blood pressure during 7 days of low salt (20 mmol NaCl/day) and high salt (260 mmol NaCl/day) intake. Salt sensitivity was diagnosed in 18 essential hypertensive patients (45%), each of them showing a significant increase in mean blood pressure (P < .05) from low to high salt diet. Salt-sensitive patients exhibited a high-salt-dependent increase in all blood pressure parameters including 24-h systolic, mean, diastolic blood pressure, blood pressure load, area under the curve, and awake and asleep blood pressure values. These patients exhibited a nondipper profile on both low-salt and high-salt diets. Salt-resistant patients (55%) showed a decrease in awake, and an increase in asleep blood pressure values after high salt intake, thus tending to flatten the circadian blood pressure profile. We conclude that ABPM is a useful method to assess salt sensitivity. In salt-resistant patients high salt intake induces a significant increase in asleep blood pressure with no significant changes in 24-h blood pressure, promoting a flattened blood pressure curve and tending to transform a dipper into a nondipper profile, which could have important implications in end-organ damage.
- Publication
American Journal of Hypertension, 1995, Vol 8, Issue 10, p970
- ISSN
0895-7061
- Publication type
Article
- DOI
10.1016/0895-7061(95)00225-1