OBJECTIVE: This study was performed to determine the maternal and feta
l outcome in pregnant patients with congenital aortic stenosis without
previous valvular replacement. STUDY DESIGN: A retrospective review o
f 25 pregnancies in 13 patients delivered at our centers from Septembe
r 1976 to September 1992 was undertaken. RESULTS: Five (38%) patients
had associated congenital heart lesions, three (23%) had severe stenos
is (echocardiographically estimated valve area less-than-or-equal-to 0
.7 cm2), two had prior open aortic valve commissurotomy, and one had b
alloon valvuloplasty during pregnancy. There were no maternal deaths.
Of the 25 pregnancies, five (20%) resulted in therapeutic abortions. T
here was no perinatal mortality, preterm labor, or increased incidence
of pregnancy complications or fetal growth retardation in the remaini
ng 20 pregnancies. One infant (5%) had congenital heart disease. CONCL
USION: Pregnancy outcome is generally satisfactory in patients with co
ngenital aortic stenosis.