Performance Disclosures
70-00082-01 A
Atria Electrocardiograph Operating Instructions
11-9
40 Hz Artifact Filter
The primary purpose of the 40 Hz artifact filter is to remove skeletal muscle
artifacts, i.e., undesired signals. The filter provides a better signal quality
when high-frequency noise appears. However, the filter could also lower the
peak of the QRS complex, as well as smooth some subtle details of ECG
signals. For example, this may occur with left ventricular hypertrophy and
with pediatric signals. The physician should take into account the effect of
the artifact filter when reviewing such cases.
The 40 Hz artifact filter does not affect the automatic 12-lead measurement
and interpretation analysis, but may affect the printed waveform. To view
the full bandwidth signal for an ECG, change the artifact filter to 150 Hz;
for more information, see “How to Display a Patient Record” on pg. 8-2.
Additionally, you may change the default settings on your Atria to acquire
new ECGs using the 150 Hz filter; refer to “Artifact Filter” on pg. 4-7.
Pacemaker Detection and Suspension
Unlike ECG signals, pacer signals are sharp and narrow impulses.
External interference spikes sometimes mimic the shape of pacer impulses.
Although this is a rare occurrence, it can obstruct accurate pacer detection.
When interference occurs, it causes an over-detection of possible pacer
events, and could result in interpretation errors. Pacer detection
suspension is designed to prevent possible interpretation errors due to
interference for pacing patients. However, the detection suspension will not
affect interpretation reports for patients who do not carry pacemakers.
NOTE:
If spikes appear while pacer detection is
suspended, refer to Chapter 10 for information on
eliminating electrical interference. Once you have eliminated
the source of the interference, proceed with ECG acquisition.
!
WARNING
Misdiagnosis. Using an artifact filter may affect the ECG output; the
physician is responsible for taking this into account when reviewing and
interpreting the ECG.
Содержание Atria 3100
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Страница 72: ...6 Patient Preparation 6 10 Atria Electrocardiograph Operating Instructions 70 00082 01 A...
Страница 82: ...7 Acquiring ECG Reports 7 10 Atria Electrocardiograph Operating Instructions 70 00082 01 A...
Страница 94: ...8 Patient Records 8 12 Atria Electrocardiograph Operating Instructions 70 00082 01 A...
Страница 98: ...9 Sample Printouts 9 4 Atria Electrocardiograph Operating Instructions 70 00082 01 A Setup Report Continued...
Страница 102: ...9 Sample Printouts 9 8 Atria Electrocardiograph Operating Instructions 70 00082 01 A Measurement Matrix...
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