NSTEMI can progress to STEMI.

NSTEMI can progress to STEMI.

• A. Only in rare cases
• B. True
• C. False
• D. Not possible

Answer: (B)

In acute coronary syndromes, the amount of blockage in a coronary artery can change over time. An NSTEMI means there is myocardial injury with partial occlusion and typically no ST-segment elevation on the initial ECG. But the same underlying process—plaque rupture with thrombus formation—can worsen, causing the occlusion to become complete. When blood flow is fully blocked and the injury becomes transmural (through the full thickness of the heart wall), the ECG changes shift to ST-segment elevation in the affected leads, defining a STEMI. So the statement is true: an NSTEMI can progress to STEMI if the occlusion progresses from partial to complete, leading to full-thickness (transmural) ischemia. This possibility is why careful monitoring, serial ECGs, and timely consideration of reperfusion are essential for NSTEMI patients, since progression can occur even after initial stabilization. However, not all NSTEMIs progress to STEMI, but the risk exists and guides close observation and management.

In acute coronary syndromes, the amount of blockage in a coronary artery can change over time. An NSTEMI means there is myocardial injury with partial occlusion and typically no ST-segment elevation on the initial ECG. But the same underlying process—plaque rupture with thrombus formation—can worsen, causing the occlusion to become complete. When blood flow is fully blocked and the injury becomes transmural (through the full thickness of the heart wall), the ECG changes shift to ST-segment elevation in the affected leads, defining a STEMI.

So the statement is true: an NSTEMI can progress to STEMI if the occlusion progresses from partial to complete, leading to full-thickness (transmural) ischemia. This possibility is why careful monitoring, serial ECGs, and timely consideration of reperfusion are essential for NSTEMI patients, since progression can occur even after initial stabilization. However, not all NSTEMIs progress to STEMI, but the risk exists and guides close observation and management.