On an ECG tracing, the period of time from the start of ventricular depolarization to the end of ventricular repolarization is the:
A)U wave.
B)QT interval.
C)ST segment.
D)PR interval.

Question

Quizplus · Accepted Answer

The period of time from the start of ventricular depolarization to the end of ventricular repolarization is known as the QT interval, which is measured from the beginning of the QRS complex to the end of the T wave. The U wave is a small positive deflection that can sometimes be seen after the T wave. The ST segment represents the period of time when the ventricles are fully depolarized and is measured from the end of the S wave to the beginning of the T wave. The PR interval represents the time it takes for the electrical impulse to travel from the atria to the ventricles and is measured from the beginning of the P wave to the beginning of the QRS complex.

On an ECG Tracing, the Period of Time from the Start