Abstract:
Aims:Congenital heart defects (CHD) affect almost 1% of all live born children and the number of adults with CHD is increasing. In families where CHD has occurred previously, estimates of recurrence risk, and the type of recurring malformation are important for counselling and clinical decision-making, but the recurrence patterns in families are poorly understood. We aimed to determine recurrence patterns, by investigating the co-occurrences of CHD in 1163 families with known malformations, comprising 3080 individuals with clinically confirmed diagnosis. Methods and results:We calculated rates of concordance and discordance for 41 specific types of malformations, observing a high variability in the rates of concordance and discordance. By calculating odds ratios for each of 1640 pairs of discordant lesions observed between affected family members, we were able to identify 178 pairs of malformations that co-occurred significantly more or less often than expected in families. The data show that distinct groups of cardiac malformations co-occur in families, suggesting influence from underlying developmental mechanisms. Analysis of human and mouse susceptibility genes showed that they were shared in 19% and 20% of pairs of co-occurring discordant malformations, respectively, but none of malformations that rarely co-occur, suggesting that a significant proportion of co-occurring lesions in families is caused by overlapping susceptibility genes. Conclusion:Familial CHD follow specific patterns of recurrence, suggesting a strong influence from genetically regulated developmental mechanisms. Co-occurrence of malformations in families is caused by shared susceptibility genes.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Ellesøe SG,Workman CT,Bouvagnet P,Loffredo CA,McBride KL,Hinton RB,van Engelen K,Gertsen EC,Mulder BJM,Postma AV,Anderson RH,Hjortdal VE,Brunak S,Larsen LAdoi
10.1093/eurheartj/ehx314subject
Has Abstractpub_date
2018-03-21 00:00:00pages
1015-1022issue
12eissn
0195-668Xissn
1522-9645pii
3916728journal_volume
39pub_type
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