What does a pacing spike preceding a QRS complex indicate?

What does a pacing spike preceding a QRS complex indicate?

• A. Paced rhythm with capture occurs if QRS follows a spike with appropriate morphology; if no QRS, capture failure.
• B. Paced rhythm is identified by the absence of QRS complexes.
• C. A paced rhythm cannot be identified on telemetry.
• D. Pacing spikes indicate lead fracture.

Answer: (A)