What is the duration of the QRS complex?

The QRS complex duration usually ranges from 0.07 to 0.11 s.
The QRS complex duration tends to be slightly longer in males than in females.
The QRS complex duration is measured from the beginning of the first Q or R wave that appears until the end of the last R, S, R' or S' wave that appears.
The QRS complex duration has a lower limit that indicates an anomaly.