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
This action restores permanent parameter values and displays the
threshold amplitude, which is one programmable amplitude step
greater than the ending test value.
If the “Ending” test value is not the point at which capture was lost,
you can use the [∧
∧∧
∧] and [∨
∨∨
∨] buttons to adjust the displayed threshold
value.
C. Measuring the Pulse Width Threshold
1. To continue, press and hold [
PROGRAM
] to execute the pulse width test.
The threshold test execution window shows the temporary values in
effect. The arrow (<<<
===
) points to the value being reduced.
Again, observe the patient’s ECG trace as the programmer automati-
cally reduces pulse width in steps. An audible “beep” indicates confir-
mation of each new pulse width value.
NOTE: The amplitude setting in effect will be the selected test value
or twice the threshold value determined in part B above, whichever is
greater. Starting pulse width will be one-half the value used in part B.
2. When capture is lost, immediately release [
PROGRAM
].
This action restores permanent parameter values and displays the
threshold pulse width, which is one programmable pulse width step
greater than the ending test value.
If the “Ending” test value is not the point at which capture was lost,
you can use the [∧
∧∧
∧] and [∨
∨∨
∨] buttons to adjust the displayed threshold
value.
3. To view the amplitude and pulse width threshold test results graphical-
ly as a strength-duration curve, select [
SHOW STRENGTH
-
DURATION
CURVE
].
Determining and Evaluating Parameter Settings 7-7