Accuracy of Noninvasive PVC Focus Localization Depending on Its Position in the Ventricles: A Simulation Study

Noninvasive localization of the foci of premature ventricular contractions (PVCs) was performed in a simulation study using ECGSim software. Single dipole model was used to represent the heart generator and to solve the inverse problem of electrocardiography. Integral body surface potential maps computed from 64 chest leads and inhomogeneous torso model were used as input data for the inverse solution. The accuracy of the PVC localization was evaluated for forty PVC positions located in eight segments in both, right and left ventricle. The mean localization errors of PVC foci in segments of the left ventricle were smaller than for segments in the right ventricle. The best result was achieved for anterior segment of the left ventricle, while the worst one was obtained for the anterior segment in the right ventricle.