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Correlation Properties and Regularity of Heart Period Time Series: Influence of Posture and Heart Disease
Author(s) -
VUKSANOVIĆ VESNA,
GAL VERA
Publication year - 2005
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1342.053
Subject(s) - supine position , medicine , sample entropy , heart rate , heart disease , cardiology , approximate entropy , heart rate variability , physical therapy , mathematics , blood pressure , time series , statistics
A bstract : Nonlinear measures of heart period variability (HPV) were determined in supine rest and standing posture in children and young adults with heart disease and compared to the control. The aim was to study influence of posture and heart disease on heart period dynamics. It was found that standing increases short‐term scaling exponent in all subjects and decreases sample entropy in healthy and less severely ill patients. Severely ill patients compared to control have higher short‐term scaling exponent in supine. Changes in nonlinear measures of HPV upon standing are more pronounced in healthy than diseased subjects due to different vagal activity.