What does the T wave signify in an ECG reading?

The T wave in an ECG reading signifies ventricular repolarization. During this phase, the ventricles, which are the lower chambers of the heart, are recovering from the electrical impulse that caused them to contract and pump blood. Repolarization is a critical part of the cardiac cycle, as it prepares the ventricles for the next depolarization and subsequent contraction.

Understanding the significance of the T wave is essential for interpreting heart rhythms and assessing heart health. Abnormalities in the T wave can indicate various cardiac conditions, such as ischemia or electrolyte imbalances. The correct interpretation of the T wave helps healthcare professionals monitor and manage patients effectively.