If the rate is 20-40 beats per minute and the QRS measures over 0.12 sec,you should suspect that the pacemaker controlling the heart is located in the:
A)SA Node.
B)atria.
C)AV junction.
D)ventricles.

Question

Quizplus · Accepted Answer

A rate of 20-40 beats per minute and a QRS duration over 0.12 seconds suggest a pacemaker located in the ventricles, such as a ventricular demand pacemaker. The SA node, atria, and AV junction typically have faster intrinsic rates and would not produce such a slow heart rate without the aid of a pacemaker.

If the Rate Is 20-40 Beats Per Minute and the QRS