Title :
Causality of heart rate - blood pressure interactions during mental and orthostatic stress
Author :
Javorka, Michal ; Czippelova, Barbora ; Chladekova, Lenka ; Turianikova, Zuzana ; Visnovcova, Zuzana ; Lazarova, Zuzana ; Tonhajzerova, Ingrid
Author_Institution :
Dept. of Physiol., Comenius Univ., Martin, Slovakia
Abstract :
Baroreflex function is usually assessed from spontaneous oscillations of blood pressure (BP) and heart rate (HR) assuming the unidirectional influence from BP to HR. However, the interaction of BP and HR is bidirectional - HR also influences BP. The novel methods based on Granger causality concept for separate analysis of feedback (baroreflex) and feedforward (mechanical) interactions between HR and BP were recently developed.
Keywords :
blood pressure measurement; electrocardiography; medical signal processing; BP signal recording; ECG signal recording; Granger causality; RRlSBP interactions; augmented feedback interaction; baroreflex function; bidirectional HR interaction; bivariate causal close-loop model; blood pressure interactions; feedback analysis; feedforward interactions; head-up tilt test; heart rate; information domain analysis; mechanical interactions; mental arithmetics; mental stress; orthostatic stress; spontaneous oscillations; supine rest; systolic blood pressure oscillations;
Conference_Titel :
Computing in Cardiology Conference (CinC), 2014
Print_ISBN :
978-1-4799-4346-3
