Question

identify this rhythm

ventricular paced with failure to capture
av paced
sinus bradycardia
atrial paced with failure to capture

Explanation:

Analyze the pacing spikes and QRS complexes

• Sharp vertical spikes (pacemaker spikes) are visible across the strip.
• The first two spikes are immediately followed by wide, deep QRS complexes, indicating successful ventricular capture.
• The third, fourth, and fifth spikes are not followed by any QRS complex or myocardial response, leaving a flat baseline.

Identify the malfunction

• The presence of pacemaker spikes without subsequent depolarization (QRS complexes) represents a failure of the electrical stimulus to depolarize the myocardium.
• This is the definition of failure to capture.

Match with the correct option

• Since the spikes are intended to depolarize the ventricles (as seen by the wide QRS complexes in the captured beats), this is a ventricular paced rhythm.
• The loss of QRS complexes following subsequent spikes confirms ventricular pacing with failure to capture.

Answer:

• Ventricular paced with failure to capture (Correct answer)
• AV paced
• Sinus Bradycardia
• Atrial Paced with failure to capture