Temporary AV Pacemaker
Report:
Upper strips:
Ventricular lead off
Atrial pacemaker rhythm 80/min
Loss of capture with reduced output
Escape sinus bradycardia
Resumption of capture at treshhold output
Lower strip:
Atrial pacemaker rhythm 53/min
Failure to pace in two cycles
Ventricular escape paced beats
Retrograde conduction
Comment:
Ventricular lead is turned off in the upper strips. The atrial spike size indicates this is a treshold exercise. The output should have been left higher judging from loss of capture in the lower strip, taken a few minutes later.
Failure of atrial activation there creates a longer pause and allows the ventricular-paced beat to occur. It also makes retrograde conduction more likely. The next atrial spike is not delayed, not being subject to post-ectopic depression.
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