ST elevation myocardial infarction EKG examples
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
EKG Examples
Shown below is an EKG demonstrating the evolution of an infarct on the EKG. ST elevation, Q wave formation, T wave inversion, normalization with a persistent Q wave suggest STEMI.
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Anterior Myocardial Infarction
Shown below is an EKG demonstrating loss of R waves throughout the anterior wall (V1-V6). QS complexes in V3-V5. ST elevation in V1-V5 with terminal negative T waves.
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Shown below is an EKG demonstrating acute anterior MI. LAD artery occlusion.
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Shown below is an EKG showing sinus rhythm with anteroseptal myocardial infarction depicting ST elevation in V1-V6 and in lead I.
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Shown below is an EKG demonstrating acute anterior myocardial infarction and left anterior hemiblock depicting ST elevation in precordial leads.
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Shown below is an EKG demonstrating old anterior myocardial infarction and bifascicular block (RBBB and LAHB) as indicated in the anterior chest leads.
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Shown below is an EKG illustrating acute MI with proximal LAD occlusion depicting ST elevation in anterior precordial leads.
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Shown below is an EKG demonstrating a 2 days old anterior infarction with Q waves in V1-V4 with persisting ST elevation, a sign of left ventricular aneurysm formation.
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Shown below is an EKG demonstrating a 2 weeks old anterior infarction with Q waves in V2-V4 and persisting ST elevation, a sign of left ventricular aneurysm formation.
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Shown below is an EKG demonstrating a large anterior wall infarction on admission. This image depicts ST elevation in V2-V5 leads.
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Shown below is an EKG showing ST elevation in the anterior precordial leads, low voltages in all the leads, poor R wave progression in the precordial leads.
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Shown below is an EKG demonstrating ST segment elevation in precordial leads signifying anterior myocardial infarction.
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Shown below is an EKG showing sinus rhythm with abnormal QRS and a Q wave in lead V2 which is suggestive of a previous anterior wall myocardial infarction.
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Shown below is an EKG demonstrating sinus rhythm and a QRS with a rightward axis, as well as wide Q waves in leads I and aVL as well as a poor R wave progression across the anterior chest leads. There is also slight ST elevation in leads I,aVL , and T wave inversion in the lateral leads. The EKG is consistent with a lateral wall myocardial infarction.
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Shown below is an EKG demonstrating acute MI in a patient with LBBB
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Anterolateral Myocardial Infarction
Shown below is an EKG demonstrating sinus rhythm. The remarkable feature is the poor R wave progression in the V1 and V2 leads and the ST elevation and T wave changes in leads V1 to V4 and I and aVL. The cardiogram suggests an anterior/ lateral MI possibly acute. There is also terminal P wave negativity in V1 suggesting a left atrial abnormality.
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Shown below is an EKG demonstrating acute myocardial infarction in in a patient with a pacemaker and LBBB. Concordant ST elevation in V5-V6 are clearly visible. There is discordant ST segment elevation > 5 mm in lead V3.
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Shown below is an EKG demonstrating findings in the same patient as in the first example 2 months before the myocardial infarction. Normal LBBB pattern.
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Shown below is an EKG showing ST elevation MI.
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Inferior Myocardial Infarction
Shown below is an EKG demonstrating ST elevation in the precordial and limb leads depicting acute inferior MI.
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Shown below is an EKG demonstrating changes during acute inferior MI depicting ST elevation in leads II, III and aVF.
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Shown below is an EKG demonstrating RBBB and inferior MI. Note to left axis deviation.
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Shown below is an EKG demonstrating lead V4R in a patient with RBBB and inferior MI, which clearly shows ST elevation.
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Shown below is an EKG demonstrating atrial fibrillation with inferior-posterior-lateral myocardial infarction and incomplete right bundle branch block. Lead I shows ST depression, suggestive of right coronary artery involvement.
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Shown below is an EKG showing ST elevation in inferior leads.
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Shown below is an EKG showing ST elevation MI.
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Shown below is an EKG showing ST elevation in inferior leads.
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Shown below is an EKG demonstrating sinus rhythm. The QRS shows Q waves in the inferior leads which are wide (>30ms) and about 25% of the QRS height in aVF. There is also slight ST elevation in the inferior leads and T wave inversion. The EKG suggests an inferior wall infarction, probably old. (the best way to determine "old" is to see a previous cardiogram).
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Posterior Myocardial Infarction
Shown below is an EKG with ST elevation in II, III, aVF (in III > II), ST depression in I, aVL, V2. Tall R in V2, otherwise normal QRS morphology. The findings are suggestive of acute posteroinferior MI.
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Shown below is an EKG demonstrating changes during acute posterolateral MI depicting ST depression in precordial leads V2-V6.
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Infero-Posterior Myocardial Infarction
Shown below is an EKG with ST depression in V1, V4, tall R in V2. ST elevation in II, III, aVF, V5 and V6.
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Shown below is an EKG with sinus bradycardia with first degree AV block and inferior-posterior-lateral myocardial infarction.
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Shown below is an EKG depicting sinus bradycardia with inferior-lateral myocardial infarction.
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Shown below is an EKG illustrating inferior-posterior myocardial infarction with complete AV block and ventricular escape rhythm with RBBB pattern and left axis, followed by sinus rhythm.
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Shown below is an EKG demonstrating atrial fibrillation and inferior-posterior myocardial infarction.
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Shown below is an EKG demonstrating inferior-posterior-lateral myocardial infarction with a nodal escape rhythm
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Shown below is an EKG showing ST elevation MI.
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Shown below is an EKG showing ST elevation MI.
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Right Ventricular Myocardial Infarction
Shown below is an EKG demonstrating ST elevation in lead V1 and aVR; reversal of V6.
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Shown below is an EKG demonstrating STEMI changes in the right precordial leads.
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Shown below is an EKG demonstrating clear ST elevation in the right precordial leads. A coronary angiography revealed a proximal right coronary artery occlusion.
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Shown below is an EKG demonstrating ST elevation in leads II, III and aVF and ST depression in leads V1, V2 and V3 depicting a posterior MI.
Left Bundle Branch Block
Shown below is an EKG demonstrating sinus rhythm with left bundle branch block, comparison with an old EKG is mandatory to evaluate whether the LBBB is new (a sign of myocardial infarction) or old.
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