Abstract 15319: Impact of Atherosclerotic Cardiovascular Disease Risk Factors on Pregnancy Outcomes in Women With Heart Disease

Abstract

Introduction: The impact of atherosclerotic cardiovascular disease (ASCVD) risk factors on pregnancy outcomes in women with pre-existing heart disease (HD) has not been examined. Aim: To determine the risk of major adverse cardiovascular events (MACE), preeclampsia and fetal events in women with HD stratified according to the presence of ASCVD risk factors. Methods: We studied a consecutive cohort of pregnant women with heart disease. ASCVD risk factors included any of the following: obesity, hypertension, dyslipidemia, diabetes or smoking. Primary outcomes were MACE (heart failure, cardiac arrest, CV death, stroke and myocardial infarction), preeclampsia and adverse fetal events (pre-term birth, small for gestational age, intraventricular hemorrhage, neonatal death and respiratory distress syndrome). Univariate logistic regression was used to determine the odds of adverse outcomes. Results: In total, 1656 pregnancies (congenital heart disease n=1041, acquired heart disease n= 420, isolated arrhythmia n=195) were included. At least one ASCVD risk factor was present in 24% of pregnancies. Overall, MACE occurred in 7.1%, preeclampsia in 4.3% and adverse fetal events in 30.1% of the pregnancies. Compared to pregnancies in women without ASCVD risk factors, those with ASCVD risk factors were more likely to have pregnancies complicated by MACE (9.7% vs 6.3%, p= 0.025), preeclampsia (8.3% vs 3.4%, p < 0.001), and fetal events (38.5% vs 27.5%, p <0.001). There were differences in maternal and fetal outcomes with or without ASCVD risk factors when stratified by diagnosis (acquired heart disease, congenital heart disease, isolated arrhythmias) (Figure 1). Conclusions: The presence of ASCVD risk factors in women with heart disease is associated with worse maternal and fetal outcomes. Modification of ASCVD risk factors may improve pregnancy outcomes.