Non-Invasive Characterization of Cardiac Activation Patterns: Contributions of Body Surface Potential Mapping in Healthy Volunteers

Abstract

Body surface potential mapping (BSPM) systems allow non-invasive investigation of the spatial-temporal behaviour of cardiac electrical activity. This study aims to present the validation (application) of 62-channel BSPM equipment. 12-lead ECG plus two leads on the back were recorded (21 healthy volunteers) and further segmented for 4 consecutive beats allowing to obtain P, QRS and T peaks and heart activity R-R, PR, QRS, ST and QT segments. The vectorcardiograms (VCG) are extracted from the electrodes placed on the torso (direct measurement -DM) or indirectly by the Inverse Dower, Uijen and Willems methods. 17 instants of time during one heart beat (P-QRS-T) (Figure 2) are used to generate sequential isopotential maps for each healthy volunteer to investigate propagation of highest and lowest potentials presented on each map. The results obtained in healthy volunteers are comparable with results in the literature, suggesting the system can help identifying heart rhythm disorders, in patients.

Classification and Location of Atrial Arrhythmic Mechanisms With Body Surface Potential Mapping

“…Leave-one-out cross validation was used to test the generalization of the classification approaches and results were evaluated based on confusion matrices and balanced accuracy. The analyses were reproduced for subsets of the original lead layout to assess the stability of the features to lower resolution scenarios: 256 [15], 127 [5], 67 [7], 64 [16], 32, 16 ,and 12 [17]. 3.…”

Aplicação do Mapeamento Eletrocardiográfico de Superfície por Meio de Exercício em Pequenos Animais

“…The first experiences with the BSPM analysis with this new equipment, including vectorcardiography, have already been approved and published. 14,15 The evolution of BSPM utilization has been very promising, especially from the experimental viewpoint, since it enables placing a much bigger number of electrodes than with standard ECG and forward evaluation of isopotential and isochronal maps.…”