A 12-lead EKG performed on a patient 4 hours after onset of chest pain reveals ST segment elevation. The nurse recognizes that this finding indicates:
A) Transient ischemia typical of unstable angina
B) Lack of permanent damage to myocardial cells
C) Myocardial infarction associated with prolonged and complete coronary thrombosis
D) Myocardial infarction associated with transient or incomplete artery occlusion
Ans: A
Feedback: The ST segment represents early ventricular repolarization. It is analyzed to identify whether it is above or below the isoelectric line, which may be a sign of cardiac ischemia.
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