Pathological Q waves

Pathological Q waves are more than 1mm wide (40 msec), 2mm tall, more than 1/4 of the QRS height. They are associated with myocardial infarction, old or current.

See also: QRS complex

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References

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In the ECGquest archives, this ECG has been tagged with: - Chest pain Anterior ST elevation Lateral ST elevation Pathological Q waves Acute Anterior MI Acute Lateral MI 12-Lead Dr Smith's ECG Blog CC BY-NC
Anterior STEMI and multiform PVCs with Narrow Coupling Interval. When to give beta blockers in acute MI?

This ECG is from a middle aged man presented with 45 minutes of chest discomfort on a background of hyperlipidemia. This was his initial ECG.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Anterior ST elevation Pathological Q waves Acute Anterior MI Acute Lateral MI 12-Lead Dr Smith's ECG Blog CC BY-NC
Anterior STEMI and multiform PVCs with Narrow Coupling Interval. When to give beta blockers in acute MI? – repeat 24h later

This ECG is from a middle aged man presented with 45 minutes of chest discomfort on a background of hyperlipidemia. This was his repeat ECG 24h later, after stenting of an LAD occlusion.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Anterior ST elevation Inverted T waves Pathological Q waves Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Anterior STEMI and multiform PVCs with Narrow Coupling Interval. When to give beta blockers in acute MI? – repeat 48h later

This ECG is from a middle aged man presented with 45 minutes of chest discomfort on a background of hyperlipidemia. This was his repeat ECG 48h later, after stenting of an LAD occlusion.

In the ECGquest archives, this ECG has been tagged with: - Anterior ST elevation Lateral ST elevation Pathological Q waves Atrial flutter Acute Anterior MI 12-Lead Dr Smith's ECG Blog Dr Ken Grauer K. Wang CC BY-NC
Tachycardia and ST Elevation – repeat day 2

This ECG is from a middle aged man presented with tachycardia, leg oedema and a raised JVP. This was his repeat ECG the next day after cardioversion and catheterisation.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Hyperacute T waves Late R wave transition Pathological Q waves 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
See what happens when hyperacute T-waves are missed

This ECG is from a man in his 60s who presented with central chest pain that started while mowing the lawn, associated with diaphoresis, nausea and vomiting, on a background of hypertension and previous infarction.

In the ECGquest archives, this ECG has been tagged with: - Inverted T waves Late R wave transition Pathological Q waves 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
See what happens when hyperacute T-waves are missed – ‘baseline’ ECG

This ECG is from a man in his 60s who presented with central chest pain that started while mowing the lawn, associated with diaphoresis, nausea and vomiting, on a background of hypertension and previous infarction. This was his prior ECG on file for comparison.

In the ECGquest archives, this ECG has been tagged with: - Pathological Q waves 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
See what happens when hyperacute T-waves are missed – post-intervention

This ECG is from a man in his 60s who presented with central chest pain that started while mowing the lawn, associated with diaphoresis, nausea and vomiting, on a background of hypertension and previous infarction. This was his repeat ECG after intervention.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Left Axis Deviation Regular Long PR Pathological Q waves Wide QRS First degree AV block RBBB 12-Lead ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG: Right Bundle Branch Block With Probable Previous M.I.

This ECG is from an 87 year old man who presented with chest discomfort.

In the ECGquest archives, this ECG has been tagged with: - Nonspecific baseline artefact Anterior ST elevation Pathological Q waves Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer 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: - Blunt Trauma Hypotension Anterior ST elevation Inferior ST elevation Lateral ST elevation Pathological Q waves Myocardial rupture 12-Lead Dr Smith's ECG Blog CC BY-NC
A Middle-Aged Man with Blunt Trauma and Hemopericardium

This ECG is from a middle aged man who presented after a single vehicle motor vehicle accident with significant energy. On arrival he was hypotensive.