ZOLL X Series Monitor Defibrillator Rev H - Manual (Page 237)

Using See-Thru CPR
9650-001355-01 Rev. H ZOLL X Series Operator’s Guide 20–5
The following figure shows a patient in PEA, which could easily be mistaken for Fine VF
because enough of the compression artifact leaks through to distort this signal. When the CPR
filter turns on, the PEA is still not obvious because of the left over ripples from the CPR signal.
About 14 seconds into this chart, the rhythm changes to asystole, which could easily be
mistaken for coarse VF. When the CPR filter turns on, the CPR compression ripples are still
obvious, making the rhythm look like Fine VF.