title: The contribution of chromosomal abnormalities to congenital heart defects: a population-based study.
abstract: We aimed to assess the frequency of chromosomal abnormalities among infants with congenital heart defects (CHDs) in an analysis of population-based surveillance data. We reviewed data from the Metropolitan Atlanta Congenital Defects Program, a population-based birth-defects surveillance system, to assess the frequency of chromosomal abnormalities among live-born infants and fetal deaths with CHDs delivered from January 1, 1994, to December 31, 2005. Among 4430 infants with CHDs, 547 (12.3%) had a chromosomal abnormality. CHDs most likely to be associated with a chromosomal abnormality were interrupted aortic arch (type B and not otherwise specified; 69.2%), atrioventricular septal defect (67.2%), and double-outlet right ventricle (33.3%). The most common chromosomal abnormalities observed were trisomy 21 (52.8%), trisomy 18 (12.8%), 22q11.2 deletion (12.2%), and trisomy 13 (5.7%). In conclusion, in our study, approximately 1 in 8 infants with a CHD had a chromosomal abnormality. Clinicians should have a low threshold at which to obtain testing for chromosomal abnormalities in infants with CHDs, especially those with certain types of CHDs. Use of new technologies that have become recently available (e.g., chromosomal microarray) may increase the identified contribution of chromosomal abnormalities even further.
authors: National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, 1600 Clifton Road, MS E-86, Atlanta, GA, USA.
authors: Robert J
authors: RJ
authors: Hartman
authors: Sonja A
authors: SA
authors: Rasmussen
authors: Lorenzo D
authors: LD
authors: Botto
authors: Tiffany
authors: T
authors: Riehle-Colarusso
authors: Christa L
authors: CL
authors: Martin
authors: Janet D
authors: JD
authors: Cragan
authors: Mikyong
authors: M
authors: Shin
authors: Adolfo
authors: A
authors: Correa
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D002869:Chromosome Aberrations / Q000706:statistics & numerical data*; D006330:Heart Defects, Congenital / Q000235:genetics*; D006801:Humans; D046228:Microarray Analysis; D015995:Prevalence; D014314:Trisomy / Q000235:genetics; D014481:United States / Q000453:epidemiology