Nonspecific baseline artefact

If the patient is sweaty, hairy or moving around, the electrodes may not be in good contact with the skin. If you see artefact like this, check the electrodes are in good contact with the skin. This is even more likely if only some of the leads are affected as some electrodes may be in better contact than others.

See also: Quality Issues and Artefact

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ECG Library (46)

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In the ECGquest archives, this ECG has been tagged with: - 12-Lead Nonspecific baseline artefact Dr Smith's ECG Blog CC BY-NC
A Text Message in the Middle of the night. Do you give thrombolytics? Repeat ECG

This ECG is from a man in his 60s who presented with chest pain.

This ECG shows baseline artefact obscuring most features of the ECG.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Nonspecific baseline artefact Atrial fibrillation Ventricular pacemaker Dr Smith's ECG Blog CC BY-NC
Computer often fails to diagnose atrial fibrillation in ventricular paced rhythm, and that can be catastrophic

This ECG is from an elderly patient who presented with a massive hemiplegic ischemic stroke due to MCA thrombus.

This ECG shows atrial fibrillation with ventricular pacemaker and significant artefact. The AF went undiagnosed.

In the ECGquest archives, this ECG has been tagged with: - Hypotension 12-Lead Nonspecific baseline artefact Bradycardia Extra P waves Irregular Peaked T waves Wide QRS Second degree AV block Hyperkalemia Dr Smith's ECG Blog CC BY-NC
What will you do for this altered and bradycardic patient?

This ECG is from a woman in her 60s who presented from a nursing home with altered mental status, hypotension, hypoxia and bradycardia.

This ECG shows an irregular rhythm due to second degree AV block with wide QRS and peaked T waves. The cause was hyperkalemia.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Nonspecific baseline artefact Biphasic T waves Normal Axis Dr Smith's ECG Blog CC BY-NC
Dynamic, Reversible, Ischemic T-wave inversion mimics Wellens’. All trops negative.

This ECG is from a middle aged man who presented with intermittent chest tightness and nausea on walking that resolved with rest. This had happened twice over the past two days. He was likely pain free at the time that this ECG was recorded.

This ECG shows terminal T wave inversion in V2-4, resembling Wellens' waves. There was no wall motion abnormality on echo and troponins were negative (so it was not a true Wellens' syndrome), but a stress echo was markedly positive. Angiogram showed a 95% LAD stenosis and 70% first diagonal stenosis. The cause of the T wave changes was likely ischemia without infarction, ie. unstable angina.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Nonspecific baseline artefact Anterior ST depression Inferior ST depression Inverted T waves R in V1 Regular Right Axis Deviation Tall P waves Normal Sinus Rhythm Right atrial enlargement ECG Interpretation CC-BY-NC-SA
ECG Blog #156 (LVH – RVH – LAA – RAA – Strain – Ischemia)
In the ECGquest archives, this ECG has been tagged with: - 12-Lead Nonspecific baseline artefact Premature atrial complex Aortic stenosis Dr Smith's ECG Blog CC BY-NC
An elderly man with sudden cardiogenic shock, diffuse ST depressions, and STE in aVR

This ECG is from a man in his 80s who presented with sudden onset chest pain and dyspnoea. This was the repeat ECG after he had an aortic valve replacement and CABG.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Nonspecific baseline artefact Serial 12-lead Anterior ST elevation Hyperacute T waves Left Axis Deviation Straightened ST segment Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without -fifth repeat ECG on day 2, after morphine

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2, after pain returned with nausea and diaphoresis that was exactly like his initial pain and did not resolve with morphine.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Nonspecific baseline artefact Serial 12-lead Anterior ST elevation Pathological Q waves Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without -repeat ECG on day 3 after second reperfusion

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 3, after two reperfusions.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Nonspecific baseline artefact Serial 12-lead Anterior ST elevation Hyperacute T waves Left Axis Deviation Sinus bradycardia Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – fourth repeat ECG on day 2

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2, after pain returned with nausea and diaphoresis that was exactly like his initial pain.

In the ECGquest archives, this ECG has been tagged with: - Diarrhoea Vomiting 12-Lead Nonspecific baseline artefact Long QT Tall U waves Hypokalemia ECG of the Week CC-BY-NC-SA
ECG of the Week – 16th July 2018 – Interpretation

This ECG is from a woman in her 50s who presented with diarrhoea and vomiting on a background of paroxysmal AF and anxiety.