Repolarization Stratification for Dipole Electrocardiotopography

The dipole component of the heart electric field has been analyzed in the context of distribution of the action potential onset timing and its duration. It has been demonstrated that the process of repolarization can be visualized as a sequence of layers with equal action potential (AP) completion time. Dipole moments of these layers can be calculated from the repolarization part of VCG and visualized as by dipole electrocardiography method (DECARTO) with the use of simple biophysical models. Such presentation will be useful for the analysis of heterogeneity of action potential characteristics in the ventricular myocardium and evaluation of its vulnerability to life-threatening arrhythmias.