When the AV bundle is completely interrupted, as in complete heart block, the

A. False  The atria continue to beat regularly at normal sinus rate.

B. True  In complete block, atria and ventricles beat independently at different rates.

C. True  Due to loss of the normal sequence of the atrial and ventricular contractions.

D. False  There is usually a single ventricular pacemaker giving an abnormal but regular QRS complex.

E. True  The ventricular intrinsic rate of beating is 30–40/minute.