Preparing the Patient
ST80i Stress Test System Instructions for Use 3-31
4 Allow the patient to get acclimated to the movement of the belt, and then provide the
patient with the following instructions:
– Keep your body straight and head up.
– Walk in a normal walking position with arms at your sides, or place your hands lightly
on the handrails for stability but do not bear down with too much gripping force.
– Use as little upper-body motion as possible and stay near the front of the treadmill.
You are now ready to begin the Exercise phase.
To begin the Exercise phase
Click the Exercise button on the Procedure bar.
The
Exercise screen is displayed.
Exercise Phase
At the start of an exercise stress test, CAlg has a “Learning Phase” where it automatically
selects the initial 12-lead dominant QRS complex. CAlg removes baseline wander and aligns
successive non-noisy complexes of similar shape and then averages them together to form a
noise-reduced representative beat. As new, similar complexes arrive, they are added to the
representative beat, and old complexes are removed from it. When CAlg stops finding good
matches for the representative beat and all old complexes have been removed, it will
automatically detect a new dominant morphology and build a new representative beat.
CAlg makes ST measurements on the noise-reduced representative beat.
During the test, you can print 12-lead ECGs automatically or manually. You can choose any of
the following display choices:
12 leads
6x2 leads
6 leads
3 leads
You can start the
Exercise phase of the test at any time; however, a warning message will be
popped up if not all 12 leads ST value is gotten from the algorithm.
Conducting the Exercise Stress Test
When you move into the Exercise phase of the test, the treadmill loads the settings associated
with the first stage of the test, and the stage and phase clocks start counting.
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