The QT interval is measured from the beginning of the _____

a. QRS complex to the end of the T wave
b. P wave to the end of the QRS complex
c. QRS complex to the beginning of the T wave
d. P wave to the beginning of the QRS complex


A
The QT interval is measured from the beginning of the QRS complex to the end of the T wave. In the absence of a Q wave, the QT interval is measured from the beginning of the R wave to the end of the T wave. The term QT interval is used regardless of whether the QRS complex begins with a Q or R wave.

Nursing

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