Infective endocarditis is not seen in –
(A) ASD (B) TOF (C) VSD (D) MR
(A) Endocarditis tends to occur in :


High pressure areas (left side of heart)
Downstream from sites where blood flows at a high velocity through a narrow orifice from a high to low-pressure chamber (distal to constriction in Coarctation of aorta)
Endocarditis is unusual in sites with a small pressure gradient as ASD
Infective endocarditis is very rare in patients of ASD
Endocarditis occurs more frequently in patients with valvular incompetence than in those with pure stenosis.
Risk of endocarditis in various lesions are :