Minimizing ECG Waveform Noise
Noise can render an ECG waveform unusable, as shown in the example below.
Many causes can result in a noisy ECG waveform, including:
5‐18 Monitoring ECG Expression MR400 Instructions for Use
Select the desired lead view setting.
The setting is changed.
When presented with poor gating or heart rate performance, it may
be necessary to use the Pediatric ECG setting; see page 5-32.
If the amplitude did not improve, repeat step 5 and cycle through
the remaining lead view settings until a 1 mV signal amplitude is
If the amplitude did not improve, remove the ECG lead cable and
the Quadtrode electrode. Then prep the application site again and
apply a new Quadtrode electrode.
Use of alcohol‐based products during patient prep.
Use of a Quadtrode electrode that is expired or dried‐out.
Use of wrong or damaged ECG cable leads.
Improper placement of the Quadtrode electrode.
Placing the MR400 inside the 5000 gauss line.
Placing the wECG module inside the bore.
MR vibrations affecting the wECG module.
Incorrect notch filter setting; see page 5‐22.