Question

The normal width of the QRS complex is which of the following? (Select all that apply.)

a. 0.06 to 0.10 seconds.
b. 0.12 to 0.20 seconds.
c. 1.5 to 2.5 small boxes.
d. 3.0 to 5.0 small boxes.
e. 0.04 seconds or greater.

Answer 1

The normal width of the QRS complex on an ECG is 0.06 to 0.10 seconds, or 1.5 to 2.5 small boxes on the ECG grid.

Step-by-step explanation:

The normal width of the QRS complex on an electrocardiogram (ECG), which represents the depolarization of the ventricles, is traditionally considered to be between 0.06 to 0.10 seconds. Therefore the correct answers to the question are a. 0.06 to 0.10 seconds and c. 1.5 to 2.5 small boxes. Option e, stating 0.04 seconds or greater is not specific enough, as the QRS duration can be greater than 0.04 seconds but should not exceed 0.10 seconds to be considered normal.