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: Pediatrics
[{'content': 'MC cause of death in an adult with PDA is – \nSelect and explain. \nA. CCF, B. Infective endocarditis, C. Rupture, D. Embolism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A most common cause of death in PDA is CCF.\nA second most common cause of death is infective endocarditis.\n\nCourse and complications of PDA\n\nSpontaneous closure of PDA does not usually occur in full-term infants because PDA in term infants results from a structural abnormality of ductal smooth muscles (In premature infants spontaneous closure may occur because PDA in these infants results from unresponsiveness to oxygen).\nPulmonary vascular pressure regress slower than normal and maximum decrease occurs around 6-8 weeks (normally at 1-3 weeks).\n\nCommon complications are : -\n\nCHF → MC complication and MC cause of death \xa0 \xa0 \xa0\xa0\nInfective endocarditis\nPulmonary hypertension\xa0\nPneumonia\nAneurysm of PDA → Rare and possible rupture in adult life', 'role': 'assistant'}]