ECG Quest > Shapes > ST segment > Inferior ST depression

Inferior ST depression

Inferior ST depression occurs in leads II, III and aVF. It is important to look for reciprocal changes, e.g. in aVL, which suggest acute coronary occlusion.

See also: ST segment

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Topics

Lead Groups

Once you know the lead directions, you can also group the leads into anatomical regions of the heart. These groups are useful because conditions like myocardial infarction may affect all of the leads in a particular group (e.g. an inferior infarct may affect the inferior leads of the ECG).

Inferior leads

Inferior leads include II, III and aVF

Septal leads

Septal leads include V1 and V2

Anterior leads

Anterior leads include V3 and V4.

Lateral leads

Lateral leads include V5, V6, I and aVL.

References

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In the ECGquest archives, this ECG has been tagged with: - Nonspecific baseline artefact Regular Right Axis Deviation Anterior ST depression Inferior ST depression Inverted T waves R in V1 Tall P waves Normal Sinus Rhythm Right atrial enlargement 12-Lead ECG Interpretation CC-BY-NC-SA
ECG Blog #156 (LVH – RVH – LAA – RAA – Strain – Ischemia)

This ECG is from a man in his 40s who had an uncorrected Tetralogy of Fallot.

Nonspecific baseline artefact Regular Right Axis Deviation Anterior ST depression Inferior ST depression Inverted T waves R in V1 Tall P waves Normal Sinus Rhythm Right atrial enlargement 12-Lead ECG Interpretation CC-BY-NC-SA
In the ECGquest archives, this ECG has been tagged with: - Chest pain Anterior ST depression Inferior ST depression ST elevation in aVL Mid-anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Thrombus propagation on 10 serial Prehospital ECGs: Can you explain the progression?

This ECG is from a patient of unknown age who presented with chest pain.

Chest pain Anterior ST depression Inferior ST depression ST elevation in aVL Mid-anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
In the ECGquest archives, this ECG has been tagged with: - Chest pain Anterior ST elevation Inferior ST depression ST elevation in aVL LAFB Mid-anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Thrombus propagation on 10 serial Prehospital ECGs: Can you explain the progression?

This ECG is from a patient of unknown age who presented with chest pain. This was the repeat ECG 19 minutes later.

Chest pain Anterior ST elevation Inferior ST depression ST elevation in aVL LAFB Mid-anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
In the ECGquest archives, this ECG has been tagged with: - Palpitations Normal Axis Regular Tachycardia Inferior ST depression Narrow QRS SVT 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 8th October 2018 – Interpretation

This ECG is from a woman in her 50s who presented with palpitations for the last few hours. She had no known medical conditions and no regular medications.

Palpitations Normal Axis Regular Tachycardia Inferior ST depression Narrow QRS SVT 12-Lead ECG of the Week CC-BY-NC-SA
In the ECGquest archives, this ECG has been tagged with: - Chest pain Concordant ST elevation Inferior ST depression Wide QRS Ventricular pacemaker Limb leads Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Anterior MI in paced rhythm, dismissed by cardiologist, patient died.

This ECG is from an elderly male who presented with chest pain. He has a pacemaker. This was his first prehospital ECG.

This ECG shows ventricular paced rhythm with concordant STE in aVR and concordant ST depression in II, III, aVF. The cause was most likely a proximal LAD or left main occlusion. This was missed and the patient died.

Chest pain Concordant ST elevation Inferior ST depression Wide QRS Ventricular pacemaker Limb leads Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
In the ECGquest archives, this ECG has been tagged with: - Chest pain Double speed 50 mm/sec Anterior ST elevation Hyperacute T waves Inferior ST depression Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A 65 year old with chest pain, ECG recorded at 50 mm/sec

This ECG is from a man in his 60s who presented with sudden central chest pressure with nausea. He had a history of previous infarction 15 years ago. This was his second ECG, taken 35 min after the first.

Chest pain Double speed 50 mm/sec Anterior ST elevation Hyperacute T waves Inferior ST depression Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
In the ECGquest archives, this ECG has been tagged with: - Chest pain Double speed 50 mm/sec Hyperacute T waves Inferior ST depression Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A 65 year old with chest pain, ECG recorded at 50 mm/sec

This ECG is from a man in his 60s who presented with sudden central chest pressure with nausea. He had a history of previous infarction 15 years ago. This was his initial prehospital ECG.

Chest pain Double speed 50 mm/sec Hyperacute T waves Inferior ST depression Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
In the ECGquest archives, this ECG has been tagged with: - Anterior ST elevation Inferior ST depression Lateral ST elevation Atrial flutter Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer K. Wang CC BY-NC
Tachycardia and ST Elevation.

This ECG is from a middle aged man presented with tachycardia, leg oedema and a raised JVP. This was his initial ECG.

Anterior ST elevation Inferior ST depression Lateral ST elevation Atrial flutter Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer K. Wang CC BY-NC
In the ECGquest archives, this ECG has been tagged with: - Dyspnoea Hypotension Normal Axis Anterior ST depression Inferior ST depression Reverse Takotsubo Takotsubo cardiomyopathy 12-Lead Dr Smith's ECG Blog CC BY-NC
An Ischemic ECG and Bedside Echo shows diffuse dysfunction but with Apical Sparing

This ECG is from a man in his 40s who presented with dyspnoea, hypotension and hypoxia. There was no chest pain. A chest xray showed diffuse pulmonary infiltrates, in a pattern consistent with pulmonary oedema.

Dyspnoea Hypotension Normal Axis Anterior ST depression Inferior ST depression Reverse Takotsubo Takotsubo cardiomyopathy 12-Lead Dr Smith's ECG Blog CC BY-NC
In the ECGquest archives, this ECG has been tagged with: - Chest pain Anterior ST elevation Inferior ST depression ST elevation in aVL Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog CC BY-NC
Prehospital OMI recognized immediately by a fantastic paramedic: 6 – shortly before VF arrest

This ECG is from a woman in her 60s who presented with chest pain and feeling clammy, on a background of hypertension and high cholesterol. This ECG was recorded just before the patient had a VF arrest.

Chest pain Anterior ST elevation Inferior ST depression ST elevation in aVL Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog CC BY-NC
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This is a library of 2323 free, open access, re-usable ECGs from across the web.

Where did they come from?

These ECGs were collected from Free Open Access Medical Education (#FOAMed) blogs, with the permission of their authors. You can find out more about each ECG's source by clicking on it.

Why are they here?

This is an experiment in digital curation. The idea is to collect resources to increase awareness and accessibility. Over time, more ECGs in the collection will be tagged to make it easier to find them and reused in new interactive quizzes.

How can I use these ECGs?

You can use these ECGs for your own learning, teaching or research - as long as you abide by the terms of each ECG's copyright licence as stipulated by the original author.