Congenital heart defects and major structural noncardiac anomalies in Alberta, Canada, 1995–2002
Article first published online: 1 FEB 2013
Copyright © 2013 Wiley Periodicals, Inc.
Birth Defects Research Part A: Clinical and Molecular Teratology
Volume 97, Issue 2, pages 79–86, February 2013
How to Cite
Lowry, R. B., Bedard, T., Sibbald, B., Harder, J. R., Trevenen, C., Horobec, V. and Dyck, J. D. (2013), Congenital heart defects and major structural noncardiac anomalies in Alberta, Canada, 1995–2002. Birth Defects Research Part A: Clinical and Molecular Teratology, 97: 79–86. doi: 10.1002/bdra.23104
- Issue published online: 11 FEB 2013
- Article first published online: 1 FEB 2013
- Manuscript Accepted: 26 OCT 2012
- Manuscript Revised: 15 OCT 2012
- Manuscript Received: 22 AUG 2012
- Alberta Congenital Anomalies Surveillance System
- Alberta Health & Wellness
- Alberta Children's Hospital Foundation. Grant Number: E-21459
- Conjoint Health Research Ethics Board in Calgary, Alberta
- Health Research Ethics Board in Edmonton, Alberta
- congenital heart disease;
- noncardiac anomalies;
Although the majority of congenital heart defects (CHDs) occur in isolation, a significant number occur with noncardiac anomalies. This study determined the proportion of noncardiac anomalies among CHD cases in Alberta.
Records of infants and children born in Alberta between January 1, 1995, to December 31, 2002, were searched using multiple sources of ascertainment in addition to the Alberta Congenital Anomalies Surveillance System (ACASS) (Alberta Health and Wellness, 2012). Each case was assigned to one CHD category and was further categorized into one of the following groups: isolated CHD, syndromes, chromosomal, associations and sequences, teratogens, Mendelian, neoplasia, heterotaxy, multiple minor anomalies, and multiple major anomalies.
Of all 3751 CHD cases (prevalence 12.42/1000 total births: confidence interval, 12.03–12.83), 75% were isolated, 10% had a chromosomal etiology, and 9% had multiple major anomalies. All other categories accounted for <2% each. The most commonly associated major noncardiac anomalies were musculoskeletal (MSK) (24%) followed by anomalies of the urinary tract (14%), gastrointestinal system (GI) (11%), and central nervous system (CNS) (11%).
This is both a population-based and clinical study using a classification scheme that could help to determine possible etiologic factors contributing to CHD. By eliminating known etiologies such as chromosomal and single gene, future studies can focus on the remainder to evaluate possible preventive measures. The most commonly associated major noncardiac anomalies involve the MSK system, followed by the urinary, GI, and CNS systems. Birth Defects Research (Part A) 2013. © 2013 Wiley Periodicals, Inc.