Which statement best describes cardiac markers in NSTEMI and STEMI?

Which statement best describes cardiac markers in NSTEMI and STEMI?

• A. Both NSTEMI and STEMI show changes in cardiac markers.
• B. Only NSTEMI shows changes in cardiac markers.
• C. Only STEMI shows changes in cardiac markers.
• D. Neither NSTEMI nor STEMI shows changes in cardiac markers.

Answer: (D)

Cardiac biomarkers indicate myocardial injury, and in myocardial infarction these markers rise as heart muscle cells die. Both NSTEMI and STEMI involve infarction with necrosis, so biomarkers such as troponin I/T and CK-MB become elevated in both conditions. The difference between NSTEMI and STEMI lies in the ECG findings and the extent or pattern of coronary occlusion, not in whether biomarkers rise. Troponin typically rises within hours after onset and remains elevated for days, confirming infarction in either presentation.

Cardiac biomarkers indicate myocardial injury, and in myocardial infarction these markers rise as heart muscle cells die. Both NSTEMI and STEMI involve infarction with necrosis, so biomarkers such as troponin I/T and CK-MB become elevated in both conditions. The difference between NSTEMI and STEMI lies in the ECG findings and the extent or pattern of coronary occlusion, not in whether biomarkers rise. Troponin typically rises within hours after onset and remains elevated for days, confirming infarction in either presentation.