Authors:
Drago Torkar
1
and
Pedro David Arini
2
Affiliations:
1
Jožef Stefan Institute, Slovenia
;
2
Facultad de Ingeniería, Universidad de Buenos Aires and ’Alberto P. Calderón’ CONICET, Argentina
Keyword(s):
Electrocardiography, Transmural Dispersion, Mapping, ANN, Pacing.
Related
Ontology
Subjects/Areas/Topics:
Artificial Intelligence
;
Biomedical Engineering
;
Biomedical Signal Processing
;
Cardiovascular Signals
;
Computational Intelligence
;
Health Engineering and Technology Applications
;
Human-Computer Interaction
;
Methodologies and Methods
;
Neural Networks
;
Neurocomputing
;
Neurotechnology, Electronics and Informatics
;
Pattern Recognition
;
Physiological Computing Systems
;
Sensor Networks
;
Signal Processing
;
Soft Computing
;
Theory and Methods
Abstract:
The ventricular repolarization dispersion (VRD) has been shown to increase with premature stimulation.
Moreover, several differences between left ventricular and right ventricular, such as the anatomic properties
and fibrillation threshold have been reported. However, few data exist regarding the influence of the site of
stimulation on modulation of VRD measure by electrocardiographic. In the present work, several ECG indices
of VRD, as a function of the coupling interval and the site of stimulation, were studied in an isolated heart
rabbit preparation (n=18), using ECG multilead (5 rows x 8 columns) system with Artificial Neural Networks.
In both ventricles, results have shown significant decreases in early repolarization duration, while in the left
ventricle we have found significant increases of transmural dispersion. Also, we have observed that when
the premature stimuli were applied to the left ventricle, the ventricular repolarization dispersion changes were
detected using only
one preferential electrode (row1-column3). When stimuli were elicited at the right ventricle,
changes of VRD were detected by three electrodes (row3-column1, row2-column1 and row3-column8).
Finally, a different ventricular repolarization dispersion was found as a function of the site of stimulatio
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