NONINVASIVE SYSTEM FOR LOCALIZATION OF SMALL REPOLARIZATION CHANGES IN THE HEART

English version České info

Novel noninvasive method for localization of areas of myocardium with changed repolarization that can lead to life threatening cardiac arrhythmias is presented. Method is based on multichannel ECG measurement, body surface potential mapping and solving the inverse problem of electrocardiology to find one or two dipoles representing the pathological sources in the heart. Body surface potential mapping system ProCardio-8 using up to 144 active electrodes was used for multichannel ECG measurement. For the inverse calculations, inhomogeneous model of the shape of thorax with lungs and ventricles including cavities was used. Ability of the system to identify selected cardiac pathologies is demonstrated on cases with one or two ischemic foci. In this paper, analysis of existing system and algorithms for cardiac pathology localization is given in detail. Further software development will include ventricular premature beat foci localization.

Keywords:
multichannel ECG recording, body surface potentials, inverse problem of electrocardiography, repolarization changes, arrhythmia

Autoři: Olena Punshchykova ^1,3; Peter Kneppo ¹; Milan Tyšler ^1,2
Působiště autorů: Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czech Republic ¹; Institute of Measurement Science, Slovak Academy of Science, Bratislava, Slovakia ²; Intercollegiate Faculty of Medical Engineering, National Technical University of Ukraine “Kyiv Polytechnic Institute”, Kyiv, Ukraine ³
Vyšlo v časopise: Lékař a technika - Clinician and Technology No. 2, 2012, 42, 7-10
Kategorie: Conference YBERC 2012

Souhrn

Keywords:
multichannel ECG recording, body surface potentials, inverse problem of electrocardiography, repolarization changes, arrhythmia

Zdroje

[1] Vardas, P., Auricchio, A., Merino, J.L. The EHRA White Book 2011. The Current Status of Cardiac Electrophysiology in ESC Member Countries. p. 498, www.escardio.org/EHRA.

[2] Karas, S., Hebláková, E., Rosík, V., Tyšler, M. Multichannel high-resolution electrocardiograph developed in Matlab. Technical Computing Prague. 16th Annual Conference Proceedings, Praha, Czech Republik, 2008, p. 55.

[3] Tyšler, M., Rosík, V., Kneppo, P. Multichannel ECG measurement for noninvasive identification of heart regions with changed repolarization. XVIII IMEKO World Congress. Metrology for a Sustainable Development, Rio de Janeiro, Brasil, 2006.

[4] Rosík, V., Karas, S., Hebláková, E., Tyšler, M., Filipová, S. Portable device for high resolution ECG mapping. Measurement science review, 2007, vol. 7, no. 6, p. 57-61.

[5] Tyšler, M., Svehlikova, J., Rosík, V., Karas, S., Hebláková, E., Kneppo, P., Muzik, J., Kania, M., Zaczek R., Kobylecka, M. Model-based method and instrumentation for noninvasive identification of local ischemic lesions in the heart. World Congress on Medical Physics and Biomedical Engineering. IFMBE Proceedings, Munich, Germany, 2009, p.1403-1406.

[6] Svehlikova, J., Lenkova, J., Turzova, M., Tysler, M., Kania, M., Maniewski R. Influence of individual torso geometry on inverse solution to 2 dipoles. J Electrocardiol, 2012, vol. 45, no. 1, p. 7 -⁠ 12.

[7] Farina, D., Dössel, O. Non-invasive model-based localization of ventricular ectopic centers from multichannel ECG. International Journal of Applied Electromagnetics and Mechanics, 2009, vol. 30, no. 3-4, p. 289-297.

[8] Denisov, A. M., Zakharov, E. V., Kalinin, A. V., Kalinin, V. V. Numerical solution of the inverse electrocardiography problem with the use of the Tikhonov regularization method. Moscow University Computational Mathematics and Cybernetics, 2008, vol. 32, no. 2, p. 61-68.