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Difficult prenatal diagnosis: fetal coarctation
A Buyens1, W Gyselaers1, A Coumans2
1Department of Obstetrics and Gynaecology, ZOL Hospitals Campus St Jan, Genk, Belgium.
Insights
Diagnosing fetal coarctation prenatally remains difficult. Ventricular disproportion is a key indicator, but newer imaging techniques and measurements show promise for improving accuracy in fetal cardiac anomaly detection.
Area of Science:
- Fetal Cardiology
- Medical Imaging
- Congenital Heart Defects
Background:
- Prenatal diagnosis of coarctation is challenging, often relying on ventricular disproportion.
- Current methods have moderate sensitivity and high false positive rates.
- Accurate prenatal diagnosis is crucial for optimizing delivery and reducing infant complications.
Purpose of the Study:
- To review and summarize methods for improving prenatal diagnosis of fetal coarctation.
- To assess the efficacy of various measurements and imaging techniques.
Main Methods:
- Systematic review of articles published between 2000 and 2011.
- Literature search of PubMed and reference lists.
- Analysis of diagnostic measurements and advanced imaging techniques.
Main Results:
- Key measurements include isthmus diameter, ductal diameter, and their ratio.
- Z-scores, shelf presence, and isthmal flow disturbance are important indicators.
- 3D/4D imaging with STIC shows potential for enhanced diagnosis.
Conclusions:
- Despite advancements, prenatal diagnosis of coarctation remains a challenge for ultrasound specialists.
- Investigating novel measurements and imaging modalities is ongoing.
- Improved prenatal detection can lead to better perinatal care for coarctation.
Abstract:
The prenatal diagnosis of fetal coarctation is still challenging. It is mainly suspected by ventricular disproportion (smaller left ventricle than right ventricle). The sensitivity of ventricular discrepancy is however moderate for the diagnosis of coarctation and there is a high false positive rate. Prenatal diagnosis of coarctation is important because the delivery can be arranged in a centre with a pediatric cardiac intensive careand this reduces postnatal complications and longterm morbidity. For many years the prenatal diagnosis of coarctation has been investigated to improve specificity and sensitivity by several of measurements. This article reviews all relevant articles from 2000 until 2011 searching pubmed and the reference list of interesting articles. An overview of specific measurements and techniques that can improve the diagnosis of coarctation has been made, such as the isthmus diameter, ductal diameter, isthmus/ductal ratio, z-scores derived from measurements of the distal aortic isthmus and arterial duct, the presence of a shelf andisthmal flow disturbance. Also 3-dimensional (3D) and 4-dimensional (4D) imaging with or without STIC has been -suggested to be used as newer techniques to improve diagnosis of coarctation in fetal life. Although more methods regarding prenatal diagnosis of coarctationare being investigated, the ultrasound specialist remains challenged to correctly diagnose this cardiac anomaly in prenatal life.
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