Myocardial Hypoxia/Ischemia

While there are no specific ECG findings that are pathognomonic for hypoxemia, some of the following may be generally suggestive:

1. Wide QRS complexes
2. ST segment depression or elevation (≥0.2 mV)
3. Tall T waves (more than 1/4 total QRS excursion)
4. Notching of the R wave of the QRS complex (microscopic intramural myocardial infarction or MIMI)
5. Low amplitude QRS complexes
6. Conduction disturbances (aberrant conduction) leading to wide and bizarre QRS morphology