 In the Adult Congenital Heart Program, obstetric patients are followed the by a specialized team of cardiologists, obstetricians and anesthesiologists who also follow all pregnant women referred with acquired cardiac disease. From this referral practice approximately 100 patients per year are now followed during their pregnancy and delivery. In conjunction with the ongoing system we intend to identify all parturients who delivered at the University Health Network Toronto General Hospital or Mount Sinai Hospital between the years 1986 and 2001. We will evaluate the anesthetic management of all women with heart disease whose pregnancies were followed at the University Health Network andor Mount Sinai Hospital between 1986 and 2001. 