Some Considerations of on Repolarization Process of vebtricular Muscle, Represented by the T Wave in the ECG

The electrogram of the frog' s ventricle was recorded with various methods, and the relationship between the repolariztion process in the muscle cell and the ''upright'' T wave in the usual electrocardiogram was discussed. 1). The extracellulary recorded potential has a derivative form of the intracellular action potential, and the positively directed potential is the result for the repolarization phase. 2). The concept of ventricular gradient seems valid for the explanation of the upright T wave. But the relative region in this concept need not be so far as described by others. 3). The rate of repolarization was also one of the important factor in the discussion.