Missing tracings: check all the lead attachments and replace any electrodes that are not adhering well. Twist the leads within the attaching clips to ensure that the leads are not pulling the adhesive pads off the patient
Wandering baseline/irregular baseline: repeat the tracing, asking the patient to relax and stay still. If this fails, attach the limb leads to the shoulders and hips; this cuts down on interference from limb muscle electrical signals
Interference on baseline: ensure no mains cables are crossing the ECG wires. If you still have a problem, try and run the ECG machine on its battery rather than on the mains. Still got a problem? Move the ECG machine to the other side of the bed and unplug any non-essential electrical equipment around the bed
Odd axis on ECG: make sure that you have the leads attached to the correct electrodes, especially the limb leads
If all else fails, get another machine.
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