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IQstress® Operation Manual
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If the treadmill speed for the first stage of exercise is too fast for the patient,
start the patient at a lower speed during the Pre-Exercise phase using the
manual treadmill controls, then click Stage Up (F4) to start the exercise protocol.
D. Exercise Phase Operation
During the Exercise phase, the software:
• Analyzes the patient’s ECG
• Updates HR and ST measurements on the screen
• Controls the treadmill according to the pre-programmed exercise protocol
• Calculates average beats, performs ST level and slope measurements based on
the calculation and saves the measurements as part of the report.
• Stores ECG rhythm strips at pre-programmed times during each test stage
The average beats, ST measurements and rhythm strips will be available for review after
the test is completed and the report has been stored in the database.
The typical activities during the Exercise phase consist of:
1. Monitor the patient for changes in HR, ECG, ST segment and blood pressure.
2. Measure and enter BP.
3. Print and/or save rhythm strips (optional).
4. Terminate exercise and enter the recovery phase.
Measure and Enter Blood Pressure
After measuring the blood pressure, click Enter BP (F5) and enter the measurement into
the dialog box as described in Section III-C, Pre-Exercise Phase Operation.
Enter the BP at any time during the Exercise phase.
Manual Treadmill Control
The software automatically controls the treadmill and changes the speed and grade
according to a pre-programmed exercise protocol (i.e., Bruce protocol). Manually
control the treadmill speed and grade as well as change the exercise stage to increase or
decrease the work level.
Control the treadmill speed or grade with the following commands:
• Slower (left arrow) decreases the treadmill belt speed by 0.1 mph.
• Faster (right arrow) increases the treadmill speed by 0.1 mph.
• Lower (down arrow) decreases the grade by 0.5%.
• Higher (up arrow) increases the elevation by 0.5%.
• Stage Up (F4) advances to the next exercise stage, causing the treadmill speed
and grade to change to the settings for the next stage.
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