Failure to Sense Can Be Recognized by

Failure to sense can be recognized by

A) the presence of pacemaker spikes that are not followed by P waves or by broad QRS complexes.
B) an absence of pacemaker spikes in the presence of a heart rate that is slower than the rate set for the pacemaker.
C) ECG pacemaker spikes that fall where they shouldn't.
D) a tachycardia with a pacemaker spike preceding each QRS complex on the EGG.