Toronto, April 2: Women who give birth to infants with congenital heart defects may have an increased risk of heart problems, including heart attack and heart failure, later in life, warns a new study. Compared to mothers of infants without congenital heart defects, the researchers found 43 per cent higher risk of any cardiovascular hospitalisation in women whose offspring had critical heart defects. The study of more than one million women also showed 24 per cent higher risk of any cardiovascular hospitalisation in women whose infants had non-critical defects.