Body surface ECG signal shape dispersion.
The spatial distribution of the shape of the electrocardiography (ECG) waves obtained by body surface potential mapping (BSPM) is studied, using a 64-channel high-resolution ECG system. The index associated to each lead is the shape difference between its ECG wave and a reference computed taking into account all the leads on the same column. The reference is either a selected real wave or a synthetic signal computed by integral shape averaging (ISA). Better results are obtained with the ISA signal using the distribution function method (DFM) for computing the shape difference. The spatial dispersion of ECG waves is showed to allow the separation of patients after myocardial infarction (MI) from healthy subjects. In addition, the reference signal position for each column is computed. The path linking these positions appears as an invariant, i.e., it is independent of the subject and the ECG wave.
Khaddoumi
Balkine
B
Laboratory of Informatics, Signals and Systems of Sophia Antipolis (I3S), University of Nice-Sophia Antipolis, Bat. Euclide B, Les Algorithmes, 2000 Rte des Lucioles, BP 121, 06903 Sophia Antipolis, France. balkine@yahoo.fr
Rix
Hervé
H
Meste
Olivier
O
Fereniec
Małgorzata
M
Maniewski
Roman
R
D000465:Algorithms; D018780:Body Surface Potential Mapping / Q000379:methods*; D003198:Computer Simulation; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D008955:Models, Cardiovascular; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000503:physiopathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity