Conotruncal heart defects (CHD)s are group of congenital cardiovascular anomalies. They are a leading cause smpytomatic cyanotic cardiac disease diagnosed in utero.
They may account for upto a fifth of all congenital cardiac anomalies diagnosed prenatally 2.
Due to parallel fetal circulation these are well tolerated in utero. Affected individuals there present with acute hypoxia within the first few days follwing delivery. In present day and age most are detected on in utero ultrasound.
They are usually defined as malformations of the cardiac outflow tracts and presumably result from either a disturbance of the outflow tract of the embryonic heart, or impaired development of the branchial arch and arteries, or both.
This class of defects includes
- truncus arteriosus
- tetralogy of Fallot
- interrupted aortic arch
- double outlet right (or left) ventricle
- transposition of the arteries
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- 1. Long J, Ramadhani T, Mitchell LE. Epidemiology of nonsyndromic conotruncal heart defects in Texas, 1999-2004. Birth Defects Res. Part A Clin. Mol. Teratol. 2010;88 (11): 971-9. doi:10.1002/bdra.20724 - Pubmed citation
- 2. Espinoza J, Romero R, Kusanovic JP et-al. The role of the sagittal view of the ductal arch in identification of fetuses with conotruncal anomalies using 4-dimensional ultrasonography. J Ultrasound Med. 2007;26 (9): 1181-8. J Ultrasound Med (full text) - Free text at pubmed - Pubmed citation
Synonyms & Alternative Spellings
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