Key result
Specific fetal echo markers are linked to a ~6-fold higher need for early Tetralogy of Fallot intervention.
Why the study?
Prenatal predictors of early postnatal intervention in tetralogy of Fallot remain uncertain.
Do fetal echocardiogram measurements (pulmonary valve Z-score and ductus arteriosus flow) predict the need for early intervention in prenatally diagnosed simple Tetralogy of Fallot?
Cohort (n=253)
Yes
Do fetal echocardiogram measurements (pulmonary valve Z-score and ductus arteriosus flow) predict the need for early intervention in prenatally diagnosed simple Tetralogy of Fallot?
Fetal echocardiographic parameters, specifically a pulmonary valve Z-score ≤ -3.5 or abnormal ductus arteriosus flow at 28-32 weeks gestation, can accurately predict the need for early cardiac intervention in infants with simple Tetralogy of Fallot.
May aid prenatal counseling in simple ToF; hypothesis-generating and requires prospective validation before guiding management.
OBJECTIVE: Prenatal predictors of early postnatal intervention in tetralogy of Fallot (ToF) remain uncertain. This study aimed to identify prenatal cardiac and non-cardiac predictors of disease severity associated with early intervention in ToF. METHODS: This retrospective cohort study included prenatally diagnosed infants with simple ToF who underwent cardiac surgery or catheter intervention in their first year in Aotearoa New Zealand and Australia 2010-2019. Fetal echocardiography measurements from 28 to 32 weeks of gestation and prenatally diagnosed genetic and extracardiac structural anomalies were recorded. Comparison was made between infants undergoing early (≤ 30 days) and later intervention. RESULTS: Of 253 infants, 33 (13%) underwent an early intervention. Infants requiring early intervention had lower pulmonary valve (PV) Z-scores (-4.7 ± 2.2 vs. -2.6 ± 1.6; p < 0.0001) or abnormal ductus arteriosus (DA) flow (14/30 (47%) versus 20/158 (13%), p < 0.001). A PV Z-score ≤ -3.5 or abnormal flow in the DA strongly predicted the timing of intervention (sensitivity 79%, specificity 70%, AUC 0.81). There was no association between the presence of a genetic or extracardiac anomaly and the timing of cardiac intervention. CONCLUSION: Early intervention in ToF can be predicted from fetal echocardiogram measurements, including a PV Z-score ≤ -3.5 or abnormal DA flow at 28-32 weeks gestation. These findings have implications for prenatal counselling and planning of prenatal obstetric care.
No takes yet. Share an insight, caveat, or question.
Vetten et al. (2025) conducted a cohort in Simple Tetralogy of Fallot (ToF) (n=253). Abnormal ductus arteriosus flow vs. Normal ductus arteriosus flow was evaluated on Early intervention (cardiac surgery or interventional cardiac catheterisation within 30 days of birth) (OR 6.0, 95% CI 2.5-14.5, p=<0.001). Abnormal ductus arteriosus flow or a pulmonary valve Z-score ≤ -3.5 on fetal echocardiogram strongly predicted the need for early cardiac intervention within 30 days of birth in infants with simple Tetralogy of Fallot.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: