Certified Rhythm Analysis Technician (CRAT) Practice Exam 2025 – All-in-One Study Guide for Exam Success!

Question: 1 / 400

Which waveform represents ventricular repolarization on an ECG strip?

P wave

R wave

S wave

T wave

The T wave represents ventricular repolarization on an ECG strip. During the cardiac cycle, after the ventricles contract and depolarize (which is represented by the QRS complex), they need to return to their resting state, which is characterized by repolarization. The T wave visually represents this process, showing the recovery phase of the ventricles as they prepare for the next heartbeat. Understanding this is crucial for accurate interpretation of an ECG, as it allows technicians to assess the electrical activity of the heart and identify various cardiac conditions.

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