A nurse is monitoring a client's heart rhythm following insertion of a permanent pacemaker. Which of the following images should the nurse expect?

A: This tracing shows occasional premature ventricular contractions (PVCs) with normal QRS complexes, which is not characteristic of a paced rhythm. A permanent pacemaker typically produces consistent pacing spikes preceding the QRS complex. B: This tracing demonstrates a very rapid, wide-complex rhythm consistent with ventricular tachycardia, not a normal paced rhythm. This is a potentially life-threatening arrhythmia requiring immediate intervention. C: This tracing shows an irregular rhythm with abnormal QRS morphology, likely atrial fibrillation with conduction abnormalities. It does not show consistent pacemaker spikes before each QRS complex. D: This tracing displays regular pacing spikes immediately preceding each QRS complex, which is expected in a client with a functioning permanent pacemaker. The spikes indicate the pacemaker is delivering electrical impulses to stimulate ventricular contraction.