Fetal detection, risk stratified care algorithms give infants with CHD their best chance to thrive
Mary Donofrio, M.D., medical director of Prenatal Cardiology at Children’s National, and other dedicated pediatric cardiologists working in this evolving specialty have spent most of the last two decades defining the field.
Congenital heart disease (CHD) can be detected in utero with precision and accuracy. With advanced technology, identification of a problem happens earlier than ever, including identifying details that predict whether a baby may be dangerously sick at birth. This gives fetal and pediatric cardiologists time to make plans for delivery and specialized care immediately after birth. These critical first moments can be the key to survival for infants with the most complicated defects.
Mary Donofrio, M.D., medical director of Prenatal Cardiology at Children’s National Hospital, and other dedicated pediatric cardiologists working in this evolving specialty have spent most of the last two decades defining the field and demonstrating the importance of making sure every child with a congenital heart defect is diagnosed as early as possible to give them the best chance for a healthy life.
Children’s National leads the way
Children’s National performs more than 4,000 fetal ultrasounds each year to detect and manage the unborn child with congenital heart disease, making it one of the most experienced centers in the United States at finding these conditions and planning for their care.
For more than 20 years, every fetus diagnosed with congenital heart disease at Children’s National following an obstetrician referral has their anticipated level of delivery room care assigned by a fetal cardiologist. Protocols were created at Children’s National and validated to establish specialized delivery room management for each patient. The management plan includes specifics about the time and place of delivery and which delivery room staff members are required for stabilization and care after birth based on the severity of the condition.
The outcomes from this approach were published in a landmark 2013 study showing the impact on improving outcomes for infants with the most serious forms of congenital heart disease. Since then, these protocols have become part of more extensive fetal cardiology care guidelines that are in use both at Children’s National and around the world.
“The guidelines we wrote include recommendations about who should get a fetal echo, how to do a fetal echo, how to manage babies in utero including when a fetal intervention might be necessary, and finally how to decide the level of cardiology care that should be present in the delivery room,” according to Donofrio, who served as lead author.
In Washington, D.C., approximately 60 to 75% of congenital heart defects are diagnosed before a baby is born, giving doctors and other care providers critical days, weeks and months to plan how best to protect the fragile infant during their transition into the world from the safe haven of their mother’s body.
What’s next
Fetal imaging guidelines tell obstetricians which expecting mothers should be referred for a fetal ultrasound given a higher level of risk for CHD over the population risk. However, most women do not have any risk factors that will trigger additional testing beyond obstetrical screening. Also, many families even if referred are far from a center that is qualified to perform a fetal echocardiogram to detect these conditions.
Research at Children’s National, led by Anita Krishan, M.D., and Dr. Donofrio in collaboration with the Fetal Heart Society, an international research collaborative, showed that in the U.S., factors such as socio-economic status, ethnicity and geography are important barriers to detection of severe congenital heart diseases such as hypoplastic left heart syndrome and transposition of the great arteries.
In a follow-up study by Jennifer Klein, M.D., and Dr. Krishnan, distance was not the only barrier to detecting CHD, however. Geo-mapping technology using zip codes allowed the team at Children’s National to pinpoint “hot spots” where detection is decreased, even in places where care should be available. The Heart Center team is hoping to work with providers in these neighborhoods to improve access to care and help educate local clinic providers about how to image and when to refer for further testing.
Donofrio and colleagues are also working to develop ways to improve the diagnosis of fetal heart disease in places that are far from the Heart Center. This includes exploring more portable diagnostic tools and applying telehealth strategies to connect fetal heart experts with local care providers to make an action plan, before a baby arrives potentially in distress. In addition, a phone-based application is under development to help sonographers to identify abnormal images in real time during routine scans in remote locations. Improved detection rates have also opened the doors to powerful new studies investigating how maternal health and stress impacts brain development in fetuses with congenital heart disease. Ongoing research looks at ways to better support expecting mothers, with the goal of helping moms cope with stress during pregnancy so her baby has the best chance possible to be born healthy and strong.
Donofrio says she won’t stop until in utero detection of congenital heart disease is 100%. “Where you live, your neighborhood, your life experience or how far you live from the Heart Center, should not decrease our ability to do everything possible to care for every baby and achieve the best outcome possible,” she says.
