raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1479

Atrial septal defect-atrioventricular conduction defects syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
No data available
Status
active

An extremely rare genetic congenital heart disease characterized by the presence of atrial septal defect, mostly of the ostium secundum type, associated with conduction anomalies like atrioventricular block, atrial fibrillation or right bundle branch block.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAtrial septal defect-atrioventricular conduction defects syndrome
frSyndrome de communication interauriculaire-trouble de la conduction atrioventriculaire
deAtriumseptumdefekt mit atrio-ventrikulären ReizleitungsstörungenVorhofseptumdefekt mit atrio-ventrikulären Reizleitungsstörungen
esSíndrome de comunicación interauricular con defecto de conducción
itDifetto interatriale con difetto di conduzione
nlAtriumseptumdefect - atrioventriculaire geleidingsdefecten-syndroom
ptComunicação inter-auricular-defeito na condução auriculo-ventricular
plWada przegrody międzyprzedsionkowej - zaburzenia przewodzenia przedsionkowo-komorowe
csSyndrom zahrnující defekt septa síní a poruchy atrioventrikulárního převodu
ukСиндром дефекту міжпередсердної перегородки-порушення атріовентрикулярної провідності
zh房间隔缺损-房室传导障碍综合征
trAtriyal septal defekt-atriyoventriküler kondüksiyon defektleri sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM108900Evalidated
ICD-10Q21.1NTBTattributedvalidated
ICD-11LA8E.1NTBTattributedvalidated
MONDO0007173Evalidated
UMLSC4510872Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
NKX2-5Disease-causing germline mutation(s) inAssessedHGNC:2488ENSG000001830726005845q35.1NK2 homeobox 519049681[PMID]_18375255[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET
Cases/families11 casesWorldwideCase(s)Validated9561886[PMID]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

3 annotations · validated 2017-08-02
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001671Abnormal cardiac septum morphology
HP:0011675Arrhythmia
HP:0011710Bundle branch block

Run the differential on the 3 obligate / very frequent terms

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Sources for this card