Myocardial ischemia EKG changes

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  1. T wave inversion is common in the V1-6 leads since they are nearest the ventricle
    1. flat or minimal T wave inversion may be a normal variant in any of the limb leads but if it is seen in V1-6 it is pathological
  2. ST segment elevation is often the earliest sign of infarction on the EKG (acute infarction)
    1. if the ST segment is elevated without associated Q waves, it may represent non-Q wave infarction
  3. NOTE: a ventricular aneurysm or pericarditis may also cause ST elevation
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