STEMI is associated with involvement of which portion of the ventricular wall?

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Multiple Choice

STEMI is associated with involvement of which portion of the ventricular wall?

Explanation:
STEMI reflects transmural ischemia, meaning the infarction spans the full thickness of the ventricular wall—from endocardium through myocardium to epicardium. This full-thickness involvement underlies the classic ST-segment elevations on ECG, signaling injury across the entire wall. In contrast, NSTEMI typically shows subendocardial ischemia, affecting only the inner portion of the wall. So the best answer is the whole thickness of the ventricular wall.

STEMI reflects transmural ischemia, meaning the infarction spans the full thickness of the ventricular wall—from endocardium through myocardium to epicardium. This full-thickness involvement underlies the classic ST-segment elevations on ECG, signaling injury across the entire wall. In contrast, NSTEMI typically shows subendocardial ischemia, affecting only the inner portion of the wall. So the best answer is the whole thickness of the ventricular wall.

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