This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
Commonest congenital lesion complicated by infective endocarditis is 
Select and explain. 
A. ASD, B. VSD, C. PDA, D. TOF
B: VSD
Answer: B: VSD 
Explanation: 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