Prenatal diagnosis of congenital heart disease: impact of mode of delivery on neonatal outcome.

Objective: We sought to evaluate the impact of mode of delivery (MOD) on early outcome for neonates diagnosed prenatally with major forms of congenital heart disease (CHD).

Methods: We retrospectively studied infants admitted, over a 2-year period, to a single institution for cardiac intervention. Infants were grouped on the basis of timing of diagnosis (prenatal/postnatal) and MOD--planned (induced labor or planned cesarean delivery) versus spontaneous labor. Multivariate logistic regression was used to evaluate independent predictors for MOD and early outcomes.

Results: Of 329 patients, 45% received a prenatal diagnosis of CHD. A prenatal diagnosis of CHD increased the likelihood for planned delivery [odds ratio (OR) 2.6, 95% confidence interval (CI) 1.6 to 4.5, p < 0.001]. Newborns prenatally diagnosed with CHD were more likely to have been delivered between 8 am and 6 pm, Monday through Friday (OR 2.3, 95% CI 1.1 to 4.8, p = 0.019). However, MOD had no statistical impact on Apgar score, duration of pre-operative intubation, and survival to surgery or to discharge. The Risk Adjustment for Congenital Heart Surgery 1 surgical mortality score was the only independent predictor of hospital mortality.

Conclusions: In our experience, although a prenatal diagnosis of CHD decreased the likelihood of spontaneous labor, MOD had no demonstrable impact on neonatal outcome.