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Brachial-ankle pulse wave velocity as a marker of atherosclerotic vascular damage and cardiovascular risk.

The measurement of brachial-ankle pulse wave velocity (baPWV) is simple and applicable for general population studies. The present study was conducted to evaluate the applicability of baPWV for screening cardiovascular risk as well as for use as a marker of the severity of atherosclerotic vascular damage in a general population. baPWV was measured in a cross-sectional study involving two cohorts constituting a total of 10,828 subjects who underwent annual health screening check up examinations (6,716 males and 4,112 females; age 30 to 74 years). The Framingham risk score and Pocock's score were obtained. Multivariate analysis demonstrated that baPWV was associated with both scores, independently from conventional atherosclerotic risk factors. The receiver-operator characteristic curve demonstrated that a baPWV of 14.0 m/s is useful for risk stratification by Framingham score and to discriminate patients with either stroke or coronary heart disease (n=143), but the likelihood ratios were less than 5.0. Logistic regression analysis demonstrated that a baPWV>14.0 m/s is an independent variable for the risk stratification by Framingham score and for the discrimination of patients with atherosclerotic cardiovascular disease. Thus, baPWV has potential as a new marker of cardiovascular risk and may be more useful than other conventional markers; in addition, baPWV is easy to obtain and serves as an indicator of either atherosclerotic cardiovascular risk or severity of atherosclerotic vascular damage; thus it is useful to screen the general population. While the discriminating powers are not sufficiently high, a cutoff value of 14.0 m/s serves to screen subjects, especially in middle-aged ones, of either gender.