Congenital heart defect
From Freepedia
A congenital heart defect is a defect in the structure of the heart and great blood vessels of the newborn.
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Overview
Congenital heart defects can be broadly categorised into two groups, acyanotic heart defects ('pink' babies) and cyanotic heart defects ('blue' babies). The acyanotic defects may further be divided into obstructive heart defects and shunts.
Epidemiology
Slightly less than 1% of all newborn infants have congenital heart disease. Eight defects are more common than all others and make up 80% of all congenital heart diseases, whereas the remaining 20% consist of many independently infrequent conditions or combinations of several defects. Ventricular septal defect (VSD) is generally considered to be the most common type of malformation, accounting for about <math>1/3</math> of all congenital heart defects.
The incidence is higher when a parent or a sibling has a heart defect (4-5%), in stillborns (3-4%), abortuses (10-25%), and premature infants (2%).
Aetiology
The cause of most congenital heart disease is unknown.
Where a cause is known, it may be of a multifactorial origin and/or a result of genetic predisposition and environmental factors.
Known genetic causes of heart disease includes chromosomal abnormalities such as trisomies 21, 13, and 18, as well as a range of newly recognised genetic point mutations, point deletions and other genetic abnormalities as seen in syndromes such as CATCH 22, familial ASD with heart block, Alagille syndrome, Noonan syndrome, and many more.
Known ante-natal environmental factors include maternal infections (Rubella), drugs (alcohol, hydantoin, lithium and thalidomide) and maternal illness (diabetes mellitus, phenylketonuria, and systemic lupus erythematosus).
Defects
Aortic stenosis, or AS
Atrial septal defect, or ASD
Atrioventricular septal defect, or AVSD
Coarctation of the aorta, or CoA
Congenitally corrected transposition of the great arteries, or CCTGA
Patent ductus arteriosus, or PDA, also known as persistent ductus arteriosus
Pulmonary atresia, or PA
Pulmonary stenosis, or PS
Tetralogy of Fallot, or ToF
Total anomalous pulmonary venous connection, or TAPVC, also known as total anomalous pulmonary venous drainage, or TAPVD
Transposition of the great arteries
Ventricular septal defect, or VSD
External Links
- Card-AG, The Cardiologycal Working Group of the University Pediatric Clinic Munster
- GUCH Website for people with congenital heart defects
- British Heart Foundation details on congenital heart defects
- Adult Congenital Heart Association US-based organization for adults with congenital heart disease
