Dynamic properties of QT intervals

Author

Halamek, Josef ; Jurak, P. ; Vondra, V. ; Lipoldova, J. ; Leinveber, P. ; Plachy, M. ; Frana, P. ; Kara, T.

Author_Institution

Inst. of Sci. Instrum., ASCR, Brno, Czech Republic

fYear

2009

fDate

13-16 Sept. 2009

Firstpage

517

Lastpage

520

Abstract

Five dynamic models of QT/RR coupling are tested on measurements of tilt table test at 19 healthy individuals. RMS of error signal (difference between measured and computed QT) and correlation coefficient (R) between error signal and RR are analyzed. Four models were based on weighted average of RR intervals-constant weighting, exponential weighting with linear dependency and nonlinear dependency and the new model given by exponential weighting, linear dependency and direct coupling with RR-MDCEXP. The fifth model was based on transfer function-MTRF. According to both parameters, RMS (P < 0.001), R (P < 10^-7) MDCEXP and MTRF are the best. Between MDCEXP and MTRF does not exist significant differences.

Keywords

diseases; electrocardiography; medical signal processing; physiological models; ECG; QT intervals; correlation coefficient; dynamic properties; error signal; exponential weighting; heart disease; Couplings; Finite impulse response filter; Heart rate; Heart rate interval; Hospitals; Instruments; Shape measurement; Signal analysis; Testing; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology, 2009

Conference_Location

Park City, UT

ISSN

0276-6547

Print_ISBN

978-1-4244-7281-9

Electronic_ISBN

0276-6547

Type

conf

Filename

5445357