Dispersion of ventricular repolarization: Temporal and spatial

Figure 1 Transmembrane action potential and pseudo electrocardiogram recordings from a canine arterially perfused ventricular wedge preparation reveal the cellular basis for the T wave. Top: Action potentials simultaneously recorded from endocardial, epicardial, and M region sites; Bottom: Electrocardiogram recorded across the wedge; the peak and the end of T-wave correspond to the end-of-repolarization of epicardial and M-cells, correspondingly. Compiled from Figure 2[8]. ECG: Electrocardiogram.