UCLA Chest Pain and Unstable Angina

Abnormal ECG #2. Ischemia does not deviate the QRS axis. Ischemia affects repolarization initially. Ischemia without infarction will only affect the T-wave. If the condition becomes more severe and an infarction occurs, then the axis can be deviated in the QRS complex. In lead 1 we see an R and R1. R and R1 may be due to a bundle branch block. ................
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