The T wave signifies what process in the heart?

The T wave signifies what process in the heart?

• A. Atrial depolarization
• B. Rapid phase of ventricular repolarization
• C. Ventricular contraction
• D. Resting phase of the heart

Answer: (B)

The T wave on an electrocardiogram (EKG) represents the process of ventricular repolarization. This is the phase where the ventricles, after having contracted to pump blood out of the heart, are recovering and returning to their resting state. During ventricular repolarization, the electrical activity moves back to a baseline level, allowing the heart muscle cells to prepare for the next contraction cycle.

This is important for maintaining a coordinated and efficient heartbeat, as proper repolarization ensures the ventricles are ready to fill with blood before the next contraction. The T wave visually captures this essential electrical recovery, reflective of cellular processes that restore the resting membrane potential after the action potential. Understanding the T wave is crucial for assessing heart health, as abnormalities can indicate various cardiac conditions.