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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Commonest congenital lesion complicated by infective endocarditis is
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The correct answer is  VSD is the commonest congenital lesion complicated by infective endocarditis. The incidence of infective endocarditis has been estimated as 2/100 patients in a follow up of ten years, that is 1/500 patient years. The incidence of infective endocarditis is small enough that it is not an indication for operation in small defects. However, it is impoant to emphasize good oral-dental hygiene in all patients with VSD. Reference: Essential Paediatrics; O.P. Ghai; Page no: 417