Final answer:
The T wave occurs during the phase of ventricular repolarization, which follows the depolarization indicated by the QRS complex in an ECG.
Step-by-step explanation:
The T wave in the cellular electrogram, or ECG, occurs during the phase of ventricular repolarization. At the cellular level, following ventricular depolarization which is represented by the large QRS complex, there is a plateau phase, and then eventually, the T wave indicates when the repolarization of the ventricles begins. This repolarization phase of the contractile cells, which includes the T wave, accounts for the period when the heart muscles are returning to their resting state in preparation for the next contraction, ensuring that the heart can pump blood effectively and maintain its rhythm.
The T wave occurs during the phase of ventricular relaxation, also known as diastole. It represents the repolarization of the ventricles.
The T wave occurs during the phase of ventricular relaxation, also known as diastole. It represents the repolarization of the ventricles. The T wave is visible on an electrocardiogram (ECG) and marks the beginning of ventricular relaxation.