Abstract
We hypothesized that one minus the slope of diastolic on systolic blood pressure in individual 24-h ambulatory blood pressure recordings (ambulatory arterial stiffness index) might reflect arterial stiffness and predict cardiovascular mortality. In volunteers and a population recruited in China, we studied concordance between ambulatory arterial stiffness index and established indexes of arterial stiffness. We assessed the predictive value of ambulatory arterial stiffness index in relation to cardiovascular outcome in Irish hypertensive patients. In 166 healthy volunteers, aged 22-83 years, the correlation coefficient between ambulatory arterial stiffness index and pulse wave velocity was 0.51 (P<0.001). In 348 randomly recruited Chinese, the correlations between ambulatory arterial stiffness index and both the central and peripheral systolic augmentation indexes were significantly stronger than those for 24-h ambulatory pulse pressure, particularly in study participants younger than 40 years. Among normotensive participants, the 95th percentile of the ambulatory arterial stiffness index was 0.55 in 234 Chinese and 0.57 in 1617 Europeans enrolled in the International Database on Ambulatory Blood Pressure Monitoring. The upper b...Continue Reading
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