Journal
INTERNATIONAL JOURNAL OF CARDIOLOGY
Volume 127, Issue 3, Pages 387-389Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.ijcard.2007.04.027
Keywords
nocturnal hypertension; circadian rhythm; left mass ventricular index; left ventricular hypertrophy
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The classification of subjects as nocturnal hypertensives in accordance with non-dipping (i.e. systolic blood pressure - BP - fall <10%) is less reproducible as compared to the fixed cut-off limits method (nocturnal BP means >120/70 mm Hg). The present study was carried out to assess if nocturnal hypertension defined by fixed cut-off limits may be a better predictor of left ventricular hypertrophy (LVH) than to non-dipping. Echocardiography and 24-h ambulatory blood pressure monitoring were performed in 223 subjects. Logistic regression showed that nocturnal hypertension defined by fixed cut-off limits was a significant predictor of LVH (OR=11.1, 95% CI=3.0-40.1) whereas non-dipping was not (OR=1.4,95% CI=0.4-5.5). No interaction was detected (p<.3). These results suggest that the definition of nocturnal hypertension based on fixed cut-off values is a better predictor of left ventricular hypertrophy than non-dipping. (C) 2007 Elsevier Ireland Ltd. All rights reserved.
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