Cardiovascular and Obstetric Delivery Complications in Pregnant Women With Valvular Heart Disease

Heart disease in pregnancy and risk of pre-eclampsia: a Swedish register-based study

BACKGROUND AND AIMS

Pre-eclampsia complicates 3-5% of pregnancies worldwide and is associated with adverse outcomes for the mother and the offspring. Pre-eclampsia and heart failure have common risk factors, including hypertension, obesity and diabetes. It is not known whether heart failure increases the risk of pre-eclampsia. This study examines whether pregestational heart failure increases the risk of pre-eclampsia.

METHODS

In a registry-based case-cohort study that included all pregnancies in Sweden (n=3 125 527) between 1990 and 2019, all pregnancies with pre-eclampsia (n=90 354) were identified and up to five control pregnancies (n=451 466) for each case were chosen, matched on the mother's birth year. Multiple logistic regression analysis was used to evaluate the impact of heart failure on the risk of pre-eclampsia, with adjustment for established risk factors and other cardiovascular diseases.

RESULTS

Women with heart failure had no increased risk for pre-eclampsia, OR 1.02 (95% CI 0.69 to 1.50). Women with valvular heart disease had an increased OR of preterm pre-eclampsia, with an adjusted OR of 1.78 (95% CI 1.04 to 3.06). Hypertension and diabetes were independent risk factors for pre-eclampsia. Obesity, multifetal pregnancies, in vitro fertilisation, older age, Nordic origin and nulliparity were more common among women who developed pre-eclampsia compared with controls.

CONCLUSION

Women with heart failure do not have an increased risk of pre-eclampsia. However, women with valvular heart disease prior to pregnancy have an increased risk of developing preterm pre-eclampsia independent of other known risk factors.

Preconception Counseling for a Patient With a Mechanical Tricuspid Valve

A 37-year-old woman with mechanical tricuspid valve thrombosis presented for preconception consultation. Multimodality imaging confirmed a malfunctioning bileaflet mechanical tricuspid valve with both leaflets fixed and open. This case highlights the key discussions held by the multidisciplinary pregnancy heart team.

Mode of delivery among women with maternal cardiac disease

OBJECTIVE

To determine if maternal cardiac disease affects delivery mode and to investigate maternal morbidity.

STUDY DESIGN

Retrospective cohort study performed using electronic medical record data. Primary outcome was mode of delivery; secondary outcomes included indication for cesarean delivery, and rates of severe maternal morbidity.

RESULTS

Among 14,160 deliveries meeting inclusion criteria, 218 (1.5%) had maternal cardiac disease. Cesarean delivery was more common in women with maternal cardiac disease (adjusted odds ratio 1.63 [95% confidence interval 1.18-2.25]). Patients delivered by cesarean delivery in the setting of maternal cardiac disease had significantly higher rates of severe maternal morbidity, with a 24.38-fold higher adjusted odds of severe maternal morbidity (95% confidence interval: 10.56-54.3).

CONCLUSION

While maternal cardiac disease was associated with increased risk of cesarean delivery, most were for obstetric indications. Additionally, cesarean delivery in the setting of maternal cardiac disease is associated with high rates of severe maternal morbidity.

Instituting a Curriculum for Cardio-Obstetrics Subspecialty Fellowship Training

Maternal mortality is rising in the United States, and cardiovascular disease is the leading cause. Adverse pregnancy outcomes such as preeclampsia and gestational diabetes heighten the risk of cardiovascular complications during pregnancy and the peripartum period and are associated with long-term cardiovascular risks. The field of cardio-obstetrics is a subspecialty within adult cardiology that focuses on the management of women with or at high risk for heart disease who are considering pregnancy or have become pregnant. There is growing recognition of the need for more specialists with dedicated expertise in cardio-obstetrics to improve the cardiovascular care of this high-risk patient population. Current recommendations for cardiovascular fellowship training programs accredited by the Accreditation Council for Graduate Medical Education involve establishing core competency in the knowledge of managing heart disease in pregnancy. However, little granular detail is available of what such training should entail, which can lead to knowledge gaps. Additionally, dedicated advanced subspecialty training in this area is not commonly offered. Multidisciplinary collaborative teams have been shown to improve outcomes in cardiac patients during pregnancy, and cardiovascular fellows-in-training interested in cardio-obstetrics should have the opportunity to participate in and contribute to a pregnancy heart team. In this document, we describe a proposed specialized cardio-obstetrics training pathway that could serve to adequately prepare trainees to competently and comprehensively care for women with cardiovascular disease before, during, and after pregnancy.