Cross-entropy of systolic blood pressure - Pulse interval: Automatic threshold and its reliability

Abstract

This paper introduces a set of formulae for automatic evaluation of threshold level rTEOR for which the cross-entropy of systolic blood pressure (SBP) and pulse interval (PI) (Cross-ApEn) reaches its maximum. A mathematical method for estimating the level of consistency of entropy estimates is established as well. These two methods jointly determine a steady working point for consistent entropy estimates. © 2013 CCAL.