Linear and nonlinear interaction analyses of heart rate and blood pressure in pregnancy induced hypertension

Joint symbolic dynamics for the assessment of cardiovascular and cardiorespiratory interactions

“…During normal pregnancy, HR and SAP word distribution was more complex than in non-pregnant women, suggesting reduced baroreflex activity [ 14 ]. In pregnancy-induced hypertension, baroreflex activity appears to be reduced even further as indicated by reduced JSDsym and increased JSDdiam word frequencies and JSDshannon [ 70 ]. The JSD word distribution matrix also demonstrated differences in pregnancies with chronic hypertension compared with normal pregnancies [ 71 ].…”

“…The index JSDsym was shown to be moderately correlated with BRS, as estimated with the sequence method in normal subjects and patients with dilated cardiomyopathy, while JSDdiam showed inverse correlations [ 15 ]. In pregnant women and women with pregnancy-induced hypertension, JSDsym was correlated with sequence method based baroreflex indices and JSDshannon displayed inverse correlations [ 70 ]. Cardiorespiratory interaction in normal subjects assessed by joint symbolic RR and respiratory phase dynamics was more sensitive to postural change than phase averaged RSA [ 47 ].…”

Women Health Monitoring: A Survey

“…Vossl et al [8] Hypertensive pregnancy disorders are the major cause of maternal and fetus mortality. Pregnancy induced hypertension (PM) has a major impact on gestation.…”

Caracterización de medidas de regularidad en señales biomédicas. Robustez a outliers

“…Las medidas de regularidad son técnicas de procesado no lineal capaces de revelar información clínica que permanece oculta en la dinámica del sistema. La utilidad de estas medidas como una ayuda al diagnóstico ha quedado demostrada en diversos entornos como la neurología [6,7,8], cardiología [9,10,11,12], endocrinología [13], neonatología [14,15] y genética [16,17].…”

“…La AMI puede verse como una versión no lineal de la función de autocorrelación [43]. En el campo de análisis de señales biomédicas, se ha empleado como método para medir semejanzas entre el sistema respiratorio y cardiovascular [44] o entre el ritmo cardíaco y la presión sanguínea [12].…”