1) Cardiac electrophysiology 
In electrocardiography, the T wave represents the repolarization (or recovery) of the ventricles. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period. The last half of the T wave is referred to as the relative refractory period (or vulnerable period). The T wave contains mor...
The next deflection in the electrocardiogram following the QRS complex; represents ventricular repolarization. ... (05 Mar 2000) ... 
Type: Term Definitions: 1. the next deflection in the electrocardiogram after the QRS complex; represents ventricular repolarization.
the second major deflection of the normal surface electrocardiogram, reflecting the potential variations occurring with repolarization of the ventricles.