Abstract
In conclusion, a prominent U wave induced by exercise testing in patients with anterior wall AMI is a highly specific but insensitive marker for the narrowing of the left circumflex or right coronary artery, due to confounding effects of repolarization abnormalities upon U-wave analysis, although a U-wave increase alone with or without ST-segment depression may help better identify these coronary artery narrowings. In patients with inferior and/or posterior AMI, a prominent U wave is regarded as a simple electrocardiographic marker for inferior and/or posterior residual ischemia.
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