Final answer:
The normal T wave is asymmetric, with the first half being slower than the second. It represents ventricular repolarization during the cardiac cycle, important for understanding electrocardiogram (ECG) readings and potential cardiac abnormalities.
Step-by-step explanation:
The normal T wave is asymmetric, with the first half moving more slowly than the second half. This is indicative of the repolarization of the ventricles during the cardiac cycle, where ventricular relaxation, or diastole, follows. The T wave on an electrocardiogram (ECG) represents this process and is usually followed by the next P wave in the next heartbeat. The normal cardiac cycle is composed of the P wave, QRS complex, and T wave, with the intervals and segments between them playing crucial roles in cardiac function. Abnormalities in the T wave can be indicative of various cardiac conditions, such as electrolyte imbalances, ischemia, or ventricular hypertrophy.