Product Manual

CareCenter MD 1.0 70-00533-02 A

3-17

ECG filters

Filters can influence the ECG: therefore, avoid using filters when they are not required.

The available filters are:

◆ Mains (AC Line) filter—inhibits disturbances coming from power supply lines,

fluorescent lamps, as well as energy-intensive consumers.

These energy-intensive entities cause electromagnetic fields which spread in the room

and can disturb ECG acquisition. Therefore, when selecting the location of the

patient for the test, consider this influence and locate a place where the network

disturbances are as low as possible.

Poor contact between electrode and body also has adverse effects on the acquisition.

Ensure the electrodes are applied properly with good contact.

◆ EMG (Muscle Artifact) filter—acts against artifacts caused by muscle motions. For

ECGs at rest, such artifacts are usually caused by having such a narrow space that

patients hold their arms to their bodies. Ensure patients lie comfortably and calmly

with enough space for their arms to rest at their sides.

◆ Baseline filter—prevents excessive excursion of the ECG waveform. Strong motions

of the patient can adversely affect the stability of the ECG waveform.

Note: When filters are applied, pacer spikes may exhibit minor distortion which will appear

as a small secondary spike immediately adjacent to the primary spike. This distortion does

not affect the automatic interpretation algorithm.

Enable a filter

Any filters that are enabled display in the title bar of the ECG representation.

◆ E—EMG (Muscle Artifact) filter

◆ M—Mains (AC Line) filter

◆ B—Baseline filter

With every new acquisition, the filters are reset to the state preset for the test procedure.

Configuration Options

Configure pre-selected settings

separately for each test

procedure

1. Select File | Options … | 12 Lead ECG | Test procedures.

2. Select the ECG tab and configure the filter settings.

Change the default filter

settings

1. Select File | Options … | 12 Lead ECG | Test procedures.

2. Select the ECG tab and configure the filter settings.