This was an older man (whatever that means) with intermittent bradycardia.
Answer: The trick here is to recognise that there is a sinus brady (about 32) which has several ramifications. A Junctional escape (about 36) results in AV dissociation with two ventricular capture beats (fifth and last). The fifth shows evidence of a 1° AVB. He reverted to a NSR so he probably has SSS. Did you diagnose a block? There isn't one but when the sinus rate gets very slow it may seem as if there is one.