Pacer Modes; Pacing In Demand Mode; Prepare The Patient - ZOLL M2 Operator's Manual

Chapter 11 External Pacing
External Pacing
The ZOLL M2 monitor/defibrillator contains a noninvasive temporary pacemaker for the
emergency treatment of hemodynamically compromising bradycardia, bradycardia with escape
rhythms that are unresponsive to pharmacological therapy, refractory tachycardia
(supraventricular or ventricular), and bradyasystolic cardiac arrest.
The ZOLL M2 monitor/defibrillator's demand pacing function is a VVI demand pacemaker
(VVI = Ventricular paced, ventricle sensed; pacing inhibited if beat sensed).
Proper demand pacing requires a reliable, high-quality surface ECG signal. For best results,
apply both standard ECG monitoring electrodes and hands-free pacing therapy electrodes to the
patient.
Note:
Note:
Note:

Pacer Modes

The ZOLL M2 has two pacer mode settings: Demand and Fixed. The defibrillator always
defaults to the Demand pacer setting when the Pacer function is initially activated.
In Demand mode, pacing pulses are inhibited when the patient's R-to-R interval is shorter than
the interval between pacer pulses at the selected rate. If no QRS complexes are detected during
the interval between pace pulses (at the selected rate), a pacing pulse is delivered to the patient.
In the demand mode, the pacer supplies the required number of pacing pulses to maintain the
patient's heart rate at approximately the rate selected in the pacing rate window. See the
procedure below, "Pacing in Demand Mode" for more information.
In Fixed mode, pacing pulses are not dependent on the patient's cardiac activity. Fixed pacing
delivers pacer pulses at the selected rate without regard to the presence of intrinsic electrical
heart activity and should be performed only in an emergency when no alternative is available.
See "Pacing in Fixed Mode" on page 11-6 for more information.

Pacing in Demand Mode

Determine patient condition and provide care following local medical protocols.
Follow the procedure below for pacing in demand mode.

Prepare the Patient

Remove all clothing covering the patient's chest. Dry chest if necessary. If the patient has
excessive chest hair, clip it to ensure proper adhesion of the electrodes.
11-2
The use of an ECG patient cable and electrodes is required to monitor ECG during
pacing.
In Pacer mode, a pads off condition triggers an ATTACH PADS message even if the
alarm audio or the alarm function is off.
In Pacer mode, the Pads off or shorted condition during active pacing triggers an
equipment alarm with a flashing yellow Clear quick access key and an alarm tone even
if the alarm audio is off or the alarm is off. If this alarm is triggered, properly attach
pads to the patient and press the Clear quick access key to respond to the alarm.
www.zoll.com 9650-000860-01 Rev. C