Anatomy & PhysiologyPregunta 76 de 100
A patient arrives with crushing chest pain radiating to the left jaw. The 12-lead shows ST segment elevation in leads II, III, and aVF. What does this pattern most likely represent?
a.Normal early repolarization
b.Atrial enlargement
c.Pericardial friction
d.An acute myocardial infarction involving the inferior wall
Explicación
ST segment elevation in a group of anatomically related leads is the classic sign of acute myocardial injury, and leads II, III, and aVF look at the inferior wall of the left ventricle. The technician does not diagnose but must recognize the pattern and notify the nurse or physician immediately. Atrial enlargement changes the P wave, not the ST segment, and benign early repolarization does not appear with this presentation of severe radiating pain.
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