Measurement of cardio-ankle vascular index (CAVI).

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Presentation transcript:

Measurement of cardio-ankle vascular index (CAVI). Measurement of cardio-ankle vascular index (CAVI). Patients were placed in the supine position. ECG and phonocardiogram (PCG) were placed to monitor the heart rhythm and heart sound, respectively. Pulse wave velocity (PWV) was obtained by measuring the distance between the aortic valve to the ankle (L) divided by time for the pulse wave to propagate from the aortic valve to the ankle (T). The PWV was then put into the equation for scale conversion. Ps, systolic blood pressure; Pd, diastolic blood pressure; ΔP, Ps−Pd; ρ, blood density; tba, time between rise in brachial pulse wave and rise in ankle pulse wave; tb, time between closing sound of aortic valve and notch in brachial pulse wave; t′b, time between opening sound of aortic valve and rise in brachial pulse wave. Teerapat Yingchoncharoen et al. Heart Asia 2012;4:77-82 Copyright © Asia Pacific Heart Association, British Cardiovascular Society & BMJ Publishing Group Ltd. All rights reserved.