A widened QRS complex on an ECG tracing could represent
A)ventricular hypertrophy.
B)ventricular-paced rhythm.
C)pacemaker tissue that is below the AV node.
D)all of the above.

Question

Quizplus · Accepted Answer

The duration of the QRS complex should not exceed 0.12 seconds (3 small squares).A widened complex indicates ventricular enlargement (hypertrophy)or that ventricular depolarization is being initiated by pacemaker tissue below the AV node,for example,ventricular-paced rhythm.In this example,one ventricle depolarizes first,and the current must spread into the second ventricle.This takes more time than when the current spreads down the bundle of His into both ventricles simultaneously.

A Widened QRS Complex on an ECG Tracing Could Represent