[Aortic valve stenosis. Prenatal diagnosis. A case].

Closed aortic valvotomy through the left ventricular apex could be performed in a 3-day old child thanks to an echocardiographic diagnosis in utero, at 32 weeks, of aortic stenosis, confirmed immediately after birth. The functional and echocardiographic results 5 months after the operation are excellent. This case shows that the prenatal diagnosis of cardiac malformation is feasible and facilitates an early treatment in the post-natal period.