Multiple choice

The ventricular origin of the heart beat is represented by

  1. the QT interval

  2. the PR interval

  3. the QRS

  4. the ST segment

  5. the T wave inversion

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The QRS complex is one of the components of a typical electrocardiogram (ECG) tracing of a complete cardiac cycle, normally occuring after the P wave. A wide and misshapen QRS may reflect bundle branch block or ventricular origin of the heart beat.