Unstable angina non ST elevation myocardial infarction electrocardiogram

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editors-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Varun Kumar, M.B.B.S.; Lakshmi Gopalakrishnan, M.B.B.S.

Electrocardiogram in Unstable angina / NSTEMI

The resting electrocardiogram in the patient with unstable angina / non ST elevation MI may show any of the following:

• No changes
• Non specific ST / T wave changes
• Flipped or inverted T waves
• ST Depression as shown below. ST depression carries the poorest prognosis. Greater magnitudes of downsloping ST depression are associated with a poorer prognosis.

Shown below is an EKG in case of unstable angina depicting ST depression.

ST Depression in a patient with unstable angina