In an adult, the normal duration of the QRS complex is _____ seconds.
A) 0.12 to 0.20
B) 0.06 to 0.11
C) 0.04 to 0.14
D) 0.20 to 0.38

Question

Quizplus · Accepted Answer

The beginning of the QRS is measured from the point where the first wave of the complex begins to deviate from the baseline. The point at which the last wave of the complex begins to level out at, above, or below the baseline marks the end of the QRS complex. The QRS is considered narrow (i.e., normal) if it measures 0.11 second or less; it is considered wide if it measures more than 0.11 second. A QRS complex of 0.11 second or less (i.e., narrow) is presumed to be supraventricular in origin.

In an Adult, the Normal Duration of the QRS Complex