SECTION 3
13
At the start of a stress test, the X-Scribe will acquire an initial 12-lead dominant QRS complex and use it to build
the first QRS template for all 12 ECG leads. The X-Scribe will update the average QRS waveform for each of the
12 leads after every beat. If the dominant QRS morphology changes, the X-Scribe will automatically detect the new
morphology and it will “learn” it as the new dominant beat morphology. This event is labeled as DRC (Dominant
Rhythm Change) on the on-screen trends.
During the test, the user can print 12-lead ECGs automatically or manually. User-definable ECG formats consist of:
6x2, 3x4, 3x4+1, 3x4+3, or 12 leads. These formats also present an optional expanded average complex at 100
mm/s and 40 mm/mV (4x standard gain), and optional associated median beats printed on the ECG.
Depending on the parameters defined at setup, the X-Scribe performs the following operations during the test:
Documents cardiac cycles that do not match the current template (arrhythmias) and stores them in memory
for review and editing in the final report.
Changes the workload at specified times for automatic treadmill and ergometer protocols.
Highlights the BP menu and sounds audible prompts to signify upcoming measurements.
Displays the expanded average complex of a user-defined lead or lead undergoing the maximum
depression in the ST segment, and compares it to a reference complex for that same lead (Auto Compare).
Displays trends of HR, ST Index, METs, NIBP, and Double Product (HR*BP).
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