Fluke Biomedical SigmaPace 1000 - Manual (Page 90)

SigmaPace 1000
Operators Manual
4-4
Output
The Analyzer measures the output of the transvenous pacemaker, and displays
the following parameters:
• Pulse Amplitude = milliamperes
• Pulse Rate = pulses per minute
• Pulse Width = milliseconds
• AV Delay = milliseconds
• Voltage = volts
• Energy = joules
To view these parameters, three choices are available from the menu: A+V
Channels, A Channel Only, and V Channel Only.
Demand Mode
Tests are performed simultaneously for both atrial and ventricular channels.
This qualitative test checks the demand mode pacemaker’s ability to interact
with a simulated dual-channel (AV) ECG signal. The Analyzer first measures
the pacemaker’s applied pulse rate, then computes “underdrive” and
“overdrive” rates for the simulated dual-channel (AV) ECG signal. Initially,
the underdrive rate is 90 % of the applied pacemaker rate, and the overdrive
rate is 110 % of the applied pacemaker rate. When testing the attached
pacemaker, operating in the demand mode, output should be active (ON) with
the underdrive ECG signal, and then inhibited (OFF) when the overdrive ECG
signal is selected. The rates of these underdrive and overdrive ECG signals
can be adjusted across a wide physiological range.
Asynchronous Mode
Tests are performed simultaneously for both atrial and ventricular channels.
This qualitative test checks the continuous (or non-demand) mode pacemaker’s
ability to interact with a simulated dual-channel (AV) ECG signal. The
Analyzer first measures the pacemaker’s applied pulse rate and then computes
“underdrive” and “overdrive” rates for the simulated ECG signal. Initially, the
underdrive rate is 90 % of the applied pacemaker rate and the overdrive rate is
110 % of the applied pacemaker rate. When testing the attached pacemaker,
operating in the continuous (or non-demand) mode, output should be active