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Delayed detection of coarctation in infancy: implications for timing of newborn follow-up
K E Ward1, R W Pryor, J R Matson
1Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City.
Insights
Early detection of coarctation of the aorta in infants is crucial. A thorough cardiovascular and pulse examination between 3-7 days of life can improve diagnosis and reduce mortality rates.
Area of Science:
- Pediatric Cardiology
- Neonatal Health
Background:
- Coarctation of the aorta is a serious congenital heart defect affecting infants.
- Delayed diagnosis in neonates leads to increased illness severity and mortality.
Purpose of the Study:
- To analyze diagnostic delays and clinical outcomes in infants with coarctation of the aorta.
- To identify key clinical signs and optimal timing for early detection.
Main Methods:
- Retrospective review of 74 infants diagnosed with coarctation of the aorta within the first 6 months of life.
- Analysis of diagnostic accuracy, clinical presentation, and mortality rates based on age at detection.
Main Results:
- Only 22% of cases were diagnosed pre-referral, despite 86% having pulse abnormalities.
- Infants diagnosed between 5-14 days had a 25% mortality rate.
- Pulse discrepancies may appear as early as 3-5 days postnatally.
Conclusions:
- Early detection of coarctation of the aorta is critical, with a pulse discrepancy potentially detectable within the first week of life.
- Routine neonatal screening including peripheral pulse and blood pressure assessment is recommended.
- A high index of suspicion is vital for timely diagnosis and improved outcomes.
Abstract:
During a recent 5-year period, 74 patients younger than 6 months of age were diagnosed with coarctation of the aorta. Coarctation was correctly diagnosed in only 22% of patients prior to referral despite readily apparent femoral pulse abnormalities in 86%. Infants whose symptoms were detected between 5 and 14 days of age were significantly more ill than infants outside this age range and had a high mortality rate (25%). The number of associated cardiac defects was not related to the severity of clinical illness in this group, suggesting that closure of the ductus arteriosus is the primary determinate of disease severity. Observations in two patients suggested that a detectable pulse discrepancy occurs between 3 and 5 days postnatally. Upper extremity hypertension was found commonly in infants after 5 days of age despite the presence of congestive heart failure. Earlier detection of coarctation in the newborn requires a diligent cardiovascular and peripheral pulse examination between 3 and 7 days of life, upper extremity and lower extremity blood pressure measurement, and a high index of suspicion.