Atria 6100 Operator's manual - Roxon

Performance Disclosures40 Hz Artifact Filter!WARNINGMisdiagnosis. Using an artifact filter may affect the ECG output; thephysician is responsible for taking this into account when reviewing andinterpreting the ECG.The primary purpose of the 40 Hz artifact filter is to remove skeletal muscleartifacts, i.e., undesired signals. The filter provides a better signal qualitywhen high-frequency noise appears. However, the filter could also lower thepeak of the QRS complex, as well as smooth some subtle details of ECGsignals. For example, this may occur with left ventricular hypertrophy andwith pediatric signals. The physician should take into account the effect ofthe artifact filter when reviewing such cases.The 40 Hz artifact filter does not affect the automatic 12-lead measurementand interpretation analysis, but may affect the printed waveform. To viewthe 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 acquirenew ECGs using the 150 Hz filter; refer to “Artifact Filter” on pg. 4-7.Pacemaker Detection and SuspensionUnlike 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 pacerevents, and could result in interpretation errors. Pacer detectionsuspension is designed to prevent possible interpretation errors due tointerference for pacing patients. However, the detection suspension will notaffect interpretation reports for patients who do not carry pacemakers.NOTE: If spikes appear while pacer detection issuspended, refer to Chapter 10 for information oneliminating electrical interference. Once you have eliminatedthe source of the interference, proceed with ECG acquisition.Atria Electrocardiograph Operating Instructions 11-9