Evaluation of Postnatal Echocardiographic Screening for Congenital Heart Defects - a Prospective Cohort Study at a German University Hospital.

Background: Congenital heart defects (CHD) being the most common congenital malformation, significantly impact mortality and morbidity in children and adults. Early detection greatly improves treatment and prognosis. Routine pulse oximetry screening and fetal echocardiography in Germany have advanced early CHD diagnosis. However, a diagnostic gap persists, leaving some CHD cases undetected, worsening prognosis. This study aimed to evaluate echocardiographic screening in newborns at a German university hospital as well as to record numerous potential risk factors in a database.

Patients and methods: This monocentric, prospective cohort study included ostensibly healthy newborns delivered between 03/2015 and 04/2016. Echocardiography was performed at an average age of 3.15 days, with follow-up by a specialist within six weeks and by telephone interview in 2019.

Results: Of 1006 newborns, 518 (51.49%) underwent echocardiography. CHD were diagnosed in 7.14% (37/518) with the following frequencies: atrial septal defect (ASD) (45.95%), ventricular septal defect (VSD) (35.14%), persistent ductus arteriosus (PDA) (8.11%), coarctation of aorta (CoA) with ASD (2.70%), quadricuspid aortic valve with VSD (2.70%), VSD with PDA (2.70%), and significant tricuspid regurgitation (2.70%). Follow-up in 2019 showed resolution of 31 CHD, while four patients continued regular cardiologist visits, with one requiring urgent surgery for severe CoA.

Conclusion: This study demonstrates that echocardiographic screening in newborns can detect previously undiagnosed CHD, including critical cases.