Specifications

7 x 9 inches (178 mm x 229 mm)
Medtronic Confidential
Refer to the “Reference man.” category in doc#163256 for Printing
Instructions.
196407001 Rev A
Before You Begin the Test Procedure
About the Sensing Test
During execution of the Sensing test, the pacemaker automatically deter-
mines whether or not sensing occurs at each of up to four sensitivity set-
tings above the selected test value. The selected test values are in effect
only while the [
PROGRAM
] button is pressed and held.
NOTE: Because this test is accomplished by a separate sensing test circuit
within the pacemaker, the operating parameters of the pacemaker during the
test (while sensitivity values are being tested) do not vary from the selected
test values. As such, the ECG and Marker Channel traces will not indicate
any changes in pacemaker operation during the test.
Test results are based on which of the tested sensitivity values resulted in,
or did not result in, sensing. For example, if sensing during an atrial test did
not occur at 4.0, 2.8, or 2.0 mV, but did occur at 1.4 mV, the test results
would state that the P-wave amplitude is “between 1.4 and 2.0 mV.” Other
outcomes of the Sensing test are covered following the test procedure.
Precautions
The Sensing test requires that the pacemaker be programmed temporarily to
a pacing rate that will result in predominantly intrinsic heart activity. (This
is necessary to allow sensing during execution of the test.) For this reason,
use of the Sensing test should be limited to patients having an intrinsic
rhythm that will provide adequate support during execution of the test.
NOTE: If the patient’s condition indicates that pacing support is needed at
any time during use of the Inhibit function or execution of the Sensing test,
the procedure can be terminated immediately by releasing the [
PROGRAM
]
button or lifting the programming head.
Waveform Display
During setup and execution of a Sensing test, the screen displays the
patient’s ECG and the telemetered waveforms being received from the
pacemaker. Buttons at the left end of the waveform display allow adjust-
ment of the waveform traces as described on pages 5-6 and 5-7.
7-16 Using the Programmer