This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Mitral stenosis is associated with \nSelect and explain. \nA. Right ventricular hyperophy, B. Left ventricular hyperophy, C. Left axis detion, D. QRS complex', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref Harrison 19 th ed pg 1540 MS and sinus rhythm, the P wave usually suggests LA enlargement ). It may become tall and peaked in lead II and upright in lead V1 when severe pulmonary hypeension or TS complicates MS and right atrial (RA) enlargement occurs. The QRS complex is usually normal', 'role': 'assistant'}]