HP PageWriter XL M1705B Service Manual page 245

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Vectorcardiography M1790A
Introduction
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The VCG application requires the A.OS.XX software. The VCG
application cannot reside on the cardiograph with the SAECG
application.
The M1790A VCG system adds vector loops reporting capability
to the PageWriter XLi cardiograph. The Vectorcardiogram (VCG)
is a recording of the changes in spatial orientation, direction
and magnitude of the electrical activity of the heart. The VCG
application requires the use of three orthogonal leads (X, Y, 2). The
PageWriter XLi cardiograph's patient module can be set up to use
Frank leads which provide the X, Y, and Z leads.
If the X,Y,Z leads were connected when the ECG was acquired and
one of the VCG report formats was configured, a one page VCG
report will be printed immediately after the ECG report any time an
ECG is printed on the cardiograph. One of the following Auto ECG
report formats must be selected in order to record a VCG:
w 3x4,lR configured with an X,Y or Z rhythm strip
n
3x4,3R configured with X,Y,Z rhythm strips
The M1730A TraceMaster ECG Management System does not print
a VCG, although you can store VCG data to the system from a disk.
Research has shown that VCGs offer incremental diagnostic value
over conventional 12-lead ECGs in the areas of atria1 enlargement,
right ventricular hypertrophy, and in the recognition of certain
infarctions.
Vectorcardiography M1790A D-l