1) What is the underlying rhythm?
2) What is the pacemaker set at? Guess the mode and rate.
3) Is there native AV conduction? If yes, what is the native AV interval?
4) What is the AV interval for paced beats?
5) What is the pacemaker doing? What is the final assessment of this patient?
6) Why do the pacing spikes appear irregular?
7) How would you manage this patient? (Further studies tests and evaluations are necessary to make an assessment and management).
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