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Electrocardiology
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Basics of ECG Interpretation11 Topics
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Normal ECG Parameters
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ECG Interpretation of Chamber Enlargement4 Topics
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Dysrhythmias
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Bradycardia
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Heart Block3 Topics
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Sick Sinus Syndrome
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Tachycardia8 Topics
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Hyperkalemia
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Myocardial Hypoxia/Ischemia
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Low Amplitude QRS Complex
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Wide QRS Complex
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Bundle Branch Block
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Differentials for ECG Abnormalities
Lesson 10 of 14
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Myocardial Hypoxia/Ischemia
While there are no specific ECG findings that are pathognomonic for hypoxemia, some of the following may be generally suggestive:
- Wide QRS complexes
- ST segment depression or elevation (≥0.2 mV)
- Tall T waves (more than 1/4 total QRS excursion)
- Notching of the R wave of the QRS complex (microscopic intramural myocardial infarction or MIMI)
- Low amplitude QRS complexes
- Conduction disturbances (aberrant conduction) leading to wide and bizarre QRS morphology
![](http://obivet.com/wp-content/uploads/2021/07/ST-Segment-Depression-in-the-Dog.jpg)
![](http://obivet.com/wp-content/uploads/2021/07/Microscopic-Intramural-Myocardial-Infarctions-MIMI-in-the-Dog.jpg)
![](http://obivet.com/wp-content/uploads/2021/07/Mimi-e2-187185-oct97-9ld.jpg)
![](http://obivet.com/wp-content/uploads/2021/07/Mimi-e2-187185-oct97-9ld-mouseover.jpg)
![](http://obivet.com/wp-content/uploads/2021/07/Mimi-e1-170088-9ld.jpg)
![](http://obivet.com/wp-content/uploads/2021/07/Mimi-e1-170088-9ld-mouseover.jpg)