What does the T wave on an ECG represent?

The T wave on an electrocardiogram (ECG) represents repolarization of the ventricles. This phase is crucial as it indicates that the ventricles are recovering and preparing for the next heartbeat after they have contracted. The repolarization process involves the return of the cardiac muscle cells to their resting state following depolarization, which is represented by the QRS complex of the ECG.

Correct understanding of the T wave is essential in monitoring heart health and diagnosing potential issues. An abnormal T wave can indicate various cardiac conditions, such as ischemia or electrolyte imbalances. This underscores the T wave's importance in assessing the heart's electrical system and overall function, making thorough knowledge of its representation vital for those involved in oral and maxillofacial surgery, especially in managing patients with cardiovascular concerns during sedation or anesthesia.