Abstract
Although, there has been a drastic decline in the incidence of rheumatic heart disease among women of child bearing age over the last three decades, more women with congenital heart disease (CHD) are living to reproductive age because of improved surgical techniques. In the last 30 years there has been a decline in overall maternal and fetal mortality and morbidity from cardiac disease; however, heart disease remains the leading cause of indirect maternal mortality.1,2,3

Maternal heart disease complicates 0.2 to 3 % of pregnancies, and congenital heart lesions now constitute at least half of all these cases.4 The classical and most commonly encountered (10% of all CHD) congenital cardiac lesion in pregnancy is the terology of Fallot (TOF). A maternal mortality report from UK had 35 death associated with cardiac disease, 29% were due to congenital heart disease, 15 % due to IHD and the remainder due to other acquired cardiac conditions.5

Key words: Tetrology of Fallot, pregnancy, congenital heart disease