Geometrical constraint of sources in noninvasive localization of premature ventricular contractions

Journal of Electrocardiology
Jana SvehlikovaM Tysler

Abstract

The inverse problem of electrocardiography for localization of a premature ventricular contraction (PVC) origin was solved and compared for three types of the equivalent cardiac electrical generator: transmembrane voltages, epicardial potentials, and dipoles. Instead of regularization methods usually used for the ill-posed inverse problems an assumption of a single point source representative of the heart generator was applied to the solution as a geometrical constraint. Body surface potential maps were simulated from eight modeled origins of the PVC in the heart model. Then the maps were corrupted by additional Gaussian noise with the signal-to-noise ratio (SNR) from 20 to 10dB and used as the input of the inverse solution. The inverse solution was computed from the first 30ms of the ventricular depolarization. It was assumed that during this period only a small part of the heart volume is activated thus it can be represented by a single point electrical source. Generally, the localization error was more dependent on the PVC origin position than on the type of the used heart generator. The most stable localization error between the inversely found results and the true PVC origin was not larger than 20mm for PVC origins located...Continue Reading

Citations

Aug 29, 2019·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Wener LvRichard J Cohen
Aug 6, 2020·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Helder PereiraChristopher A Rinaldi
Aug 12, 2019·Cardiac Electrophysiology Clinics·Ghassen ChenitiMichel Haissaguerre

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