ZOLL E Series Service Manual page 212

E Series Operator's Guide
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.
Asystole
Raw ECG
Filtered ECG
CPR
0:00
Asystole
Raw ECG
Filtered ECG
CPR
0:12
Asystole
Raw ECG
Filtered ECG
CPR
0:24
8-4
•
| Filter ON
•
| Filter OFF
Raw ECG
Filtered ECG
CPR
0:12
Raw ECG
•
| Filter ON
Filtered ECG
CPR
0:24
Raw ECG
•
| Filter OFF
Filtered ECG
CPR
0:36
12.5 mm/sec, 5 mm/mV
9650-1210-01 Rev. R