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.

Overview

The EKG in patients with unstable angina can be variable. In some cases, no changes on EKG will be appreciated. In other cases, a resting EKG may show flipped or inverted T waves, ST segment depression, or non-specific ST-T changes.

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.

EKG Examples

Shown below is an EKG from a patient with unstable angina. ST depression in V2, V3,V4 and V6 can be noted.

Copyleft image obtained courtesy of ECGpedia,http://en.ecgpedia.org/wiki/Main_Page

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