[The process of ventricular repolarization. I. Experimental study].

The sequence of ventricular repolarization process is studied in 25 dogs, using unipolar epicardial leads and some distant bipolar leads. It is concluded: 1. The sequence of ventricular repolarization process is from the base to the apex of the heart. 2. Its sense is independent from the activation process. 3. It is demonstrated the nature of the intrinsec deflection of the repolarization process. 4. The duration of the electrical systole is greater in the myocardial fibers of the right ventricle than in the fibers of the left ventricle. 5. The duration of the electrical systole is constant in the myocardial fibers of a blocked ventricle, but is delayed in the same proportion of the activation process. 6. The significance of the biphasic T wave is discussed, in the presence of bundle branch block. 7. Some bases are withdrown for the deductive interpretation of the T wave based upon the ventricular repolarization process.