Abstract 11217: Pregnancy Outcomes in Unrepaired Congenital Heart Disease a Multicenter Experience From 1272 Patients

Abstract

Introduction: The prevalence of unrepaired congenital heart disease (CHD) before pregnancy is tremendously high, especially in developing countries. And their maternal outcomes haven’t been investigated at scale in a contemporaneous population. This study describes the maternal outcomes among pregnancies with unrepaired CHD. Methods: From 1993 to 2019, we nationally enrolled 2,220 CHD pregnancies from 7 tertiary centers. Patients were subdivided into two groups: pregnancies with unrepaired CHD and with repaired CHD. Maternal and offspring outcomes of completed pregnancies and their demographics, antenatal cardiac situation, and comorbidities were collected. To identify the risk factors for cardiac outcomes, univariate and multivariate analyses were performed through logistic regression. Results: Of 2,220 completed pregnancies with CHD, 1,272 women had unrepaired CHD. The main CHD diagnosis of unrepaired CHD patients was shunt lesion (64.54%). In parturients with unrepaired CHD, the incidence of mortality and heart failure were 1.73% and 14.94%, respectively. Pregnancies with unrepaired CHD had a significantly higher incidence of adverse maternal and offspring events than pregnancies with repaired CHD. Preterm delivery (22.56%) and low birth weight (21.15%) were the most common obstetric and offspring complications. Independent risk factors for maternal cardiac events included having a New York Heart Association functional class III-IV, elevated brain natriuretic peptide level, pulmonary hypertension, delayed first antenatal care visit, absence of strict antenatal supervision, and lack of multidisciplinary team management. Conclusions: In conclusion, pregnant women with unrepaired CHD were associated with significant morbidity and mortality. And they had significantly worse maternal and offspring outcomes than pregnant women with repaired CHD.