3-dimensional Poincare plots of the QT intervals-an approach to nonlinear QT analysis

Author

Baranowski, R. ; Zebrowski, J.J. ; Poplawska, W. ; Mananas, M.A. ; Jane, R. ; Caminal, P. ; Chojnowska, L. ; Rydlewska-Sadowska, W. ; Vinolas, X. ; Guindo, J. ; De Luna, A. Bayes

Author_Institution

Nat. Inst. of Cardiology, Poland

fYear

1995

fDate

10-13 Sept. 1995

Firstpage

789

Lastpage

792

Abstract

The Poincare plots-a simple graphical, nonlinear method was implemented to express 24-h QT interval changes. The group of 23 pts with hypertrophic cardiomyopathy was analyzed (11 pts. with higher and 12 with lower risk of sudden cardiac death). The control group consisted of 10 healthy subjects. 24-h Holter ECG recordings were analyzed and RR and QT intervals were measured beat by beat. 3 dimensional QT and RR plots were constructed in the time delay coordinates. Three main forms of QT plots were observed, highly different in cases with hypertrophic cardiomyopathy compared to normals. Different shapes of QT and RR plots revealed a complex nonlinear relation of the QT and RR intervals.

Keywords

Poincare mapping; electrocardiography; medical signal processing; 24 hour; 24-h QT interval changes; 3-dimensional Poincare plots; Holter ECG recordings; QT intervals; RR plots; beat by beat; complex nonlinear relation; control group; healthy subjects; hypertrophic cardiomyopathy; nonlinear QT analysis; simple graphical nonlinear method; sudden cardiac death; time delay coordinates; Cardiology; Coordinate measuring machines; Cybernetics; Delay effects; Electrocardiography; Heart rate interval; Heart rate variability; Hospitals; Risk analysis; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1995

Conference_Location

Vienna, Austria

Print_ISBN

0-7803-3053-6

Type

conf

DOI

10.1109/CIC.1995.482783

Filename

482783