ZOLL Propaq MD Rev A - Manual (Page 172)

M ANUAL D EFIBRILLATION
14-10 www.zoll.com 9650-0805-01 Rev. A
7. Discharge the energy in the following manner.
• For internal handles with a Discharge button:
Press and hold the Discharge button on the apex handle to deliver the test energy to the
electrodes.
• For internal handles without a Discharge button:
Have a second person press and hold on the defibrillator front panel to deliver the test
energy to the electrodes.
The Propaq MD device unit discharges and displays the message DEFIB SHORT TEST
PASSED.
Synchronized Cardioversion
Warning! Only skilled personnel trained in Advanced Cardiac Life Support and familiar with
equipment operation should perform synchronized cardioversion. The precise cardiac
arrhythmia must be determined before attempting defibrillation or cardioversion.
Before attempting synchronized cardioversion, ensure that ECG signal quality is
sufficient to minimize the risk of synchronizing on artifact.
Certain arrhythmias, such as ventricular tachycardia, atrial fibrillation, and atrial flutter, require
synchronizing the defibrillator discharge with the ECG R-wave to avoid the induction of
ventricular fibrillation. In this case, a synchronizing (SYNC) circuit within the defibrillator
detects the patient’s R-waves. When the Shock button (or buttons, if using paddles) is pressed
and held, the unit discharges with the next detected R-wave, thus avoiding the vulnerable T-
wave segment of the cardiac cycle.
When in the SYNC mode, the unit displays markers ( S ) above the ECG trace to indicate the
points in the cardiac cycle (R waves) where discharge can occur.
Verify that markers are clearly visible on the monitor and their location is appropriate and
consistent from beat to beat.
The synchronized cardioversion procedure for ZOLL hands-free therapy electrodes is identical
to that for paddles with the exception of the SHOCK button location.
S marker indicates each detected
R wave during synchronization.