This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical Illness Complicating Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Peripaum cardiomyopathy is defined as occurrence of cardiac failure within what duration of delivery? \nSelect and explain. \nA. Within 7 days, B. Within 6 weeks, C. Within 24 hours, D. Within 5 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Peripaum cardiomyopathy currently is a diagnosis of exclusion following a concurrent evaluation for peripaum hea failure. Following is the diagnostic criteria: Development of cardiac failure in the last month of pregnancy or within 5 months after delivery, Absence of an identifiable cause for the cardiac failure, Absence of recognizable hea disease prior to the last month of pregnancy Left ventricular systolic dysfunction demonstrated by classic echocardiographic criteria,like reduced Ejection fraction and a dilated left ventricle.', 'role': 'assistant'}]