Is the system underlying the electrical signal of the human heart a non-linear deterministic system?

Author

Dori, G. ; Ben-Haim, S.A. ; Galamidi, Y. ; Lewis, B.S. ; Hagan, D.

Author_Institution

Rappaport Inst., Technion-Israel Inst. of Technol., Haifa, Israel

fYear

1993

fDate

5-8 Sep 1993

Firstpage

413

Lastpage

416

Abstract

Percutaneous transluminal coronary angioplasty (PTCA) is a unique clinical setup by which the effects of acute cardiac ischemia in humans may be investigated. The present study was designed to assess qualitative changes in ECG waveforms during acute ischemia induced by balloon inflation (BI). 16 patients underwent PTCA; we analyzed and compared the effect of BI on body surface ECG, as well as ECG derived phase planes, and the quality of distribution of the Poincare´ sections (PS). We found that only 50% of the ECG tracings demonstrate morphological changes during BI. In 12 of 16 patients (75%) the PS distribution was qualitatively changed during BI. We conclude that such a change implies of a nonlinear deterministic feature of the system underlying the electrical signal of the human heart

Keywords

cardiology; electrocardiography; nonlinear systems; ECG derived phase planes; ECG waveforms; Poincare´ sections; acute cardiac ischemia; balloon inflation; body surface ECG; clinical setup; electrical signal; human heart; morphological changes; nonlinear deterministic system; percutaneous transluminal coronary angioplasty; qualitative changes; Band pass filters; Bismuth; Electrocardiography; Heart; Humans; Ischemic pain; Nonlinear dynamical systems; Nonlinear equations; Surface morphology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1993, Proceedings.

Conference_Location

London

Print_ISBN

0-8186-5470-8

Type

conf

DOI

10.1109/CIC.1993.378416

Filename

378416