Cardiology Quiz #27: Evolution of Myocardial Infarction

1. A 55-year-old male presents with severe chest pain that began 2 hours ago. His ECG shows ST-segment elevation in leads II, III, and aVF. Cardiac biomarkers are ordered. Which of the following enzymes is expected to rise first in the setting of acute myocardial infarction? 

Question 1 of 5

2. A 60-year-old woman with a history of hypertension and diabetes is admitted to the hospital with chest pain. Her ECG reveals ST-segment depression and T-wave inversion. She is diagnosed with non-ST elevation myocardial infarction (NSTEMI). Which of the following biomarkers is most indicative of cardiac injury in NSTEMI? 

Question 2 of 5

3. A 65-year-old man is recovering in the hospital following an acute myocardial infarction that occurred 5 days ago. He is stable, but concerned about the healing process of his heart. At this stage post-infarction, which of the following processes is most likely occurring in the myocardium? 

Question 3 of 5

4. During a pathology lecture on myocardial infarction, a student asks about the earliest histological change detectable after an ischemic event in the heart. Which of the following changes is likely to be observed first? 

Question 4 of 5

5. A 70-year-old male is brought to the emergency department with a 4-hour history of chest pain. An ECG confirms a diagnosis of ST-elevation myocardial infarction (STEMI). He undergoes successful reperfusion therapy. Which of the following histological changes is most likely to be seen if a myocardial biopsy were performed 24 hours after the onset of his symptoms? 

Question 5 of 5


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