[A study on the genetic epidemiology of congenital heart disease]

In order to explore the genetic model of congenital heart disease (CHD), 375 individuals of CHD were investigated. The results showed that the incidence of primary relatives was 6.9%, the heritability was 66.13 +/- 1.13%, the incidence of secondary relatives was 1.7% and the heritability was 38.25 +/- 8.3% respectively. The average heritability among primary, secondary relatives was 65.65 +/- 1.09% which suggested that the genetic factor played an important role in pathogenesis. The sequence of the incidence in the relatives showed: primary relatives (6.9%) > secondary relatives (1.7%) > distant relatives (0.86%) and was in accordance with polygenic incidence, suqqesting that gene play an important role in the liability variation of CHD.