This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute coronary syndrome, Subject name: Medicine
[{'content': 'A 65-year old man presents with crushing chest pain for 2 hours. On examination, BP = 80/60 mm Hg and JVP are elevated 4 cm above the sternal angle. All are true about the condition shown except: \nSelect and explain. \nA. ST elevation in V4R, B. ST segment depression in lead II, III, aVF, C. Right ventricular infarction, D. Kussmaul sign +', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The ECG shows * Sinus rhythm is present with a normal QRS axis and tall T waves. * ST elevation >1 mm in V4R and leads II, III, aVF * ST depression (reciprocal) is present in anterior leads. * Hence the diagnosis is right ventricular MI. * Right ventricular infarction leads to hypotension with clear lung fields and presence of elevated JVP (Kussmaul sign +).', 'role': 'assistant'}]