Evidence for deterministic chaos in heart rhythms

Author

Lefebvre, J.H. ; Goodings, D.A. ; Kamath, M.V. ; Fallen, E.L.

Author_Institution

McMaster Univ., Hamilton, Ont., Canada

fYear

1992

Firstpage

459

Lastpage

461

Abstract

It is postulated that deterministic chaos modulates beat-to-beat heart rate (HR). The prediction method of Sugihara and May (1990) was applied to 1000 R-R intervals from 14 healthy human subjects and 15 patients with acute myocardial infarction (AMI). The correlation integral of Grassberger and Procaccia (1983) was constructed for each subject. No evidence was found for an attractor having a dimension <4. Short term predictability was evident in the HR data. Mean slope of predictability (MSP) was lower in patients compared to normals. The MSP may be a useful parameter for classifying neurocardiac control in healthy subjects and patients with AMI. There was no correlation between MSP and the standard deviation (SD) of the mean HR. MSP and SD may provide a more reliable characterization of the neurocardiac control than the SD alone

Keywords

biocontrol; cardiology; chaos; electrocardiography; neurophysiology; ECG; acute myocardial infarction; attractor; beat-to-beat heart rate; deterministic chaos; healthy human subjects; heart rhythms; mean slope of predictability; neurocardiac control; patients; prediction method; short term predictability; Ambient intelligence; Chaos; Control systems; Delay; Electrocardiography; Heart rate; Heart rate variability; Humans; Pressure control; Rhythm;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1992, Proceedings of

Conference_Location

Durham, NC

Print_ISBN

0-8186-3552-5

Type

conf

DOI

10.1109/CIC.1992.269512

Filename

269512