Comparative spatial resolution of 12-lead electrocardiography and an automated algorithm

Abstract Background The spatial resolution of pacemapping using 12-lead ECG or PaSo is unknown. Objective Determination of spatial resolution of traditional electrocardiography (ECG) pacemapping and pacemapping using the PaSo coefficients. Methods 17 patients undergoing ablation of supraventricular tachycardias or AV node, were included. After ablation, chamber [right ventricular outflow tract/rest of the right ventricle/left ventricle] geometry was created with Carto 3. Pacing was performed from any point in these cardiac regions, the QRS being the template and the point being considered as arrhythmia “origin”. Subsequently, pacing was performed from points around the “origin” (1538 points). The QRS of these tagged points were compared by traditional ECG pacemapping and PaSo coefficients. Spatial resolutions were calculated using correlations between the distance away from the origin (measured by three computational methods) and traditional ECG pacemapping and PaSo coefficients, independently. Results A 0.01 unit decrease in the PaSo coefficient resulted in 1.1mm increased Cartesian (95%CI, 0.9, 1.3 P Conclusion The resolution of Paso is better than traditional pace mapping.