A system and method for 3D activation recovery interval (ARI) imaging is provided that may be used to determine the spatial pattern of cardiac activation and recovery by reconstructing ARI maps noninvasively. This may be used for patients suffering from premature ventricular contraction (PVC), for example. Recovery plays an important role in the susceptibility to cardiac arrhythmias. Given the inhomogeneous and dynamic nature of the recovery pattern, a 3D ARI imaging can provide important information guiding determination of the underlying arrhythmogenesis. Additionally, 3D ARI imaging has the advantage of being able to be extracted from multiple, simultaneously recorded electrograms and reflects the dynamics and spatial characteristics of repolarization.
System and method for activation recovery interval imaging of cardiac disorders