If the wECG module is positioned incorrectly when used within the MR magnet room, the
following factors may cause ECG waveform distortion and numeric inaccuracies:
Selecting the Filter Mode
Choose the appropriate ECG filter mode for your MRI study; see page 5‐31 for mode details.
To change the filter mode setting
ECG Waveforms and VS Box
The ECG measurement is displayed as waveforms in the VS trace area of the screen and as
numeric information in the ECG VS box. Other data, including ECG‐related alarm information, are
also provided in this area of the screen, as detailed below.
5‐22 Monitoring ECG Expression MR400 Instructions for Use
Fast magnetic field changes usually found with, but not limited to, scan sequences
using Peripheral Nerve Stimulation (PNS) levels above 80 percent.
Severe vibrations induced by scan sequences using PNS levels above 80 percent.
The distance from the bore iso-center in the x, y, or z directions.
Press the ECG Filter key.
The Filter Mode menu appears. The current setting is highlighted.
Select the desired filter.
The setting is applied, as indicated in ECG VS box.