Electrical interference artefact

If the baseline looks like it has become a thick marker pen, it may be due to interference from electrical devices. Nerve stimulators can also create a similar artefact with lots of spikes close together. If possible, eliminate the source of the artefact, or adjust the filters on your ECG machine.

See also: Quality Issues and Artefact

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In the ECGquest archives, this ECG has been tagged with: - 12-Lead Electrical interference artefact Dr Smith's ECG Blog CC BY-NC
What are all these little spikes?

This ECG is from an elderly woman who presented after a fall.

This ECG shows frequent artefact spikes due to a bladder stimulator implanted for her neurogenic bladder.

In the ECGquest archives, this ECG has been tagged with: - Dyspnoea 12-Lead Electrical interference artefact Normal Axis Normal PR Normal rate Regular Wide QRS RBBB ECG of the Week CC-BY-NC-SA
ECG of the Week – 22rd January 2018 – Interpretation

This ECG is from a woman in her 70s who presented with a history of progressively worsening dyspnoea and peripheral oedema. Her past medical history included ischaemic heart disease and hypertension.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Electrical interference artefact ECG of the Week CC-BY-NC-SA
ECG of the Week – 13th June 2016 – Interpretation