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We introduce a quantitative metric to define distances among symbolic sequences. In application to the amplitude time series of arterial pressure signals, this approach provides new quantitative information that is not measured by conventional heart rate variability techniques. Complex physiologic signals may carry unique dynamical signatures that are related to their underlying mechanisms. We present...
In this study, we propose an easy-to-use non-invasive arterial stiffness assessment instrument that can be used to record the radial arterial pressure signals from the wrist. The system combines the ensemble empirical mode decomposition (EEMD) algorithm with the signals to derive a modified reflection index (MRI). The performance of MRI was verified based on 42 subjects (33 men and 9 women, 20 to...
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