The T wave represents repolarization, the recovery period of the ventricles. As emphasized in Chapter 5, the skillful interpreter focuses on the ST segment and does not try to make diagnoses based on T wave changes. T wave changes often are nonspecifi c and always should be interpreted in light of associated abnormalities of the ST segment and clinical fi ndings. An algorithmic approach for the interpretation of T wave changes is depicted in Fig. 8-1.