Cardiac arrhythmias are a major cause of death (7 million cases annually worldwide; 400,000 in the U.S. alone) and disability. Yet, a noninvasive imaging modality to identify patients at risk, provide accurate diagnosis and guide therapy is not yet available in clinical practice. Nevertheless, there are various applications of electrophysiologic imaging in humans from ECG/CT reconstructions, MRI to tissue Doppler investigations that provide supplimentary diagnostic data to th