ST Analysis (Optional)
ECG Monitoring
4 - 32
Passport V Operating Instructions
4.9.2.1
Adjusting the ISO and J/ST Point
1.
Open the
ST Menu
by using the Navigator Knob to select the ST parameter heading.
ST Menu
can also be
accessed through the
ECG Menu
.
2.
Ensure the
ST Analysis
selection in the
ST Menu
is
On
. The
Passport V
will learn
the patient's QRS complexes (one for a 3-lead leadset or 3 for a 5-lead leadset). These
learned complexes will appear in the
ST Menu
with the monitor-selected
ISO
and
J/ST
points displayed.
3.
Scroll to the
ISO
selection to adjust the isoelectric point on the learned QRS complex.
The isoelectric point is the area of the QRS complex following the P-wave and before the
start of the Q-wave.
4.
Adjust the
ISO
point by pressing the Navigator Knob and turning to adjust the white
ISO
reference line. Press the Navigator Knob when the
ISO
point is satisfactory.
5.
Scroll to the
J/ST
point heading. Adjust the
J/ST
point by pressing the Navigator Knob
and turning to adjust the orange and green
J/ST
reference lines. Press the Navigator
Knob when the
J/ST
points are satisfactory.
6.
To adjust the
ST-pt
, scroll to the
ST-pt
heading and press the Navigator Knob to display
a list of ST measurement point settings. Select the appropriate setting, then press the
Navigator Knob when the
ST-pt
choice is satisfactory.
4.9.2.2
Adjusting ST Measurement Points
ST measurement points refer to ISO point (isoelectric reference point) and ST point. The
Mortara algorithm uses the J+X method to position the ST point, which is located at X position
on the right of J point.
The following table describes the range of ST measurement points and their steps.
ST-pt is set to 60 or 80ms from the J point. When HR is greater than 120 bpm, the distance
between ST point and J point is set at 60ms; when HR is lower or equal to 120 bpm, the
distance between ST point and J point is set at 80ms.
POINT
OPTION/RANGE
STEP
ISO
-200 to -4ms
8ms
J/ST
4 to 200ms
8ms
ST-pt
40ms, 60ms, 80ms,
60/80ms
/
Содержание Passport V
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