Coarctation of the aoa is common in which syndrome-

Ans. is 'b' i.e., Turner's syndrome Coarctation of aoa o Coarctation of aoa (CoA) is a constriction of aoa due to sharp indentation involving anterior, lateral and posterior wall of aoa. o The medial wall is spared in the narrowing. 98% of coarctation occur just below the origin of left subclan occur at the origin of ductus aeriosus (Juxtaductal coarctation). It may occur just proximal to subclan A. also. o COA may be a feature of turner syndrome, and is associated with a bicuspid aoic valve. o When COA is associated with mitral valve abnormality and subaoic stenosis, it is referred to as shone complex.