What does the T wave on an ECG correlate to?

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Study for the Cardiovascular Disorders Test. Utilize flashcards and multiple choice questions with explanations. Prepare thoroughly for your exam!

Multiple Choice

What does the T wave on an ECG correlate to?

Explanation:
The T wave represents ventricular repolarization—the ventricles resetting their electrical state after contraction to be ready for the next heartbeat. After the impulse starts at the SA node, atrial depolarization creates the P wave, then ventricular depolarization creates the QRS complex, and finally the ventricles repolarize, producing the T wave. The SA node acts as the natural pacemaker that sets the rhythm, but its activity isn’t shown as a distinct wave on the ECG. So the T wave best corresponds to the ventricles’ recovery phase.

The T wave represents ventricular repolarization—the ventricles resetting their electrical state after contraction to be ready for the next heartbeat. After the impulse starts at the SA node, atrial depolarization creates the P wave, then ventricular depolarization creates the QRS complex, and finally the ventricles repolarize, producing the T wave. The SA node acts as the natural pacemaker that sets the rhythm, but its activity isn’t shown as a distinct wave on the ECG. So the T wave best corresponds to the ventricles’ recovery phase.

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