This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': "ST segment elevation is seen in: September 2005 \nSelect and explain. \nA. Prinzmetal's angina, B. Acute pericarditis, C. Acute MI, D. All of the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. D: All of the above Differential Diagnosis of ST Segment Elevation: Ischemic Hea Disease (usually convex upwards, or straightened) - Acute transmural injury (acute anterior MI) Persistent ST elevation after acute MI suggests ventricular aneurysm - ST elevation may also be seen as a manifestation of Prinzmetal's (variant) angina (coronary aery spasm) Acute Pericarditis - Concave upwards ST elevation in most leads except aVR - No reciprocal ST segment depression (except in aVR) - May see PR segment depression, a manifestation of atrial injury Other Causes: - Left ventricular hyperophy (in right precordial leads with large S-waves) - Left bundle branch block (in right precordial leads with large S-waves) - Advanced hyperkalemia - Hypothermia (prominent J-waves or Osborne waves)", 'role': 'assistant'}]