Which of the following is the gold standard for diagnosing myocardial infarction
Question : Which of the following is the gold standard for diagnosing myocardial infarction?
A. Elevated cardiac troponin I (cTnI)
B. ST-segment elevation on electrocardiogram (ECG)
C. Coronary angiography showing coronary artery occlusion
D. Typical chest pain symptoms
Answer: C
Explanation: Coronary angiography can directly visualize the location, extent, and degree of coronary artery stenosis or occlusion, and is the gold standard for diagnosing myocardial infarction. Elevated cTnI and ST-segment elevation on ECG are important diagnostic indicators but not gold standards; typical chest pain symptoms are clinical manifestations, not diagnostic criteria. Thus, the correct answer is C.
