Final answer:
The period between ventricular depolarization and repolarization is represented by the QRS complex and the T wave on an ECG, including both the ventricular systole and diastole phases.
Step-by-step explanation:
The time from the beginning of ventricular depolarization to the end of ventricular repolarization is captured as the QRS complex and the T wave on an ECG (Electrocardiogram). The QRS complex marks the start with ventricular depolarization, which leads to ventricular contraction, and the T wave signifies the end with ventricular repolarization, indicating the onset of ventricular relaxation. This duration encompasses both ventricular systole and diastole phases.
The QRS complex represents the depolarization of the ventricles, while the T wave represents the repolarization of the ventricles. During the QRS complex, the atria are also repolarizing, but this is masked on the ECG. The duration of the QRS complex and the T wave can be measured to assess the electrical activity of the ventricles.