Abstract
Objective: Critical valvular aortic stenosis is the most common congenital heart disease which requires fetal cardiac intervention. This case is presented to emphasize the significance of prenatal intervention in our country.
Case: Our case is a female infant with a birthweight of 1600 g at 29th gestational weeks from the first pregnancy of an 18 years old mother. At prenatal 24th gestational weeks critical valvuler aortic stenosis detected and resuscitated and entubated at birth. At chest roentgenogram there was findings of respiratory distress syndrome, so mechanical ventilation support applied and 2 doses of surfactant therapy given. Dopamine and alprostadil infusion was started. Critical aortic stenosis diagnosis with accompanying left ventricular failure was confirmed following postnatal echocardiographic examination. Aortic valvuloplasty preocedure was applied at the postnatal fifth hour. The patient observed to have partial improvement in vital findings following balloon valvuloplasty but was lost four hours after the intervention.
Conclusion: We believe that the number of centers where cardiac interventions will implent must be increase to a satisfactory level.

Key words: Inutero intervention, critical valvular aortic stenosis, mortality