raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99103

Atrial septal defect, ostium secundum type

Synonyms: ASD, ostium secundum type

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Autosomal dominant, Not applicable
Age of onset
Antenatal, Infancy, Neonatal
Status
active

This disease is described under Interatrial communication

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAtrial septal defect, ostium secundum typeASD, ostium secundum type
frAnomalie du septum atrial type ostium secundumASD type ostium secundum · CIA type ostium secundum
deAtriumseptumdefekt, Sekundum-TypASD vom Secundum-Typ · Atrioseptaldefekt vom Septum-secundum-Typ · Septum-secundum-Defekt · Vorhofseptumdefekt vom Sekundumtyp
esComunicación interauricular, tipo ostium secundumCIA, tipo ostium secundum
itDifetto del setto atriale, tipo ostium secundum
nlAtriaal septaal defect, ostium secundum-typeASD, ostium secundum-type
ptDefeito do septo auricular, tipo ostium secundum
plUbytek przegrody międzyprzedsionkowej, typ otworu wtórnegoASD, typ otworu wtórnego
csDefekt síňového septa, typ ostium secundumASD typ ostium secundum
ukВВС. Вторинний дефект міжпередсердної перетинкиASD, тип ostium secundum
zh房间隔缺损继发孔型继发孔型ASD
trAtriyal septal defekt, ostium sekundum tipiASD, ostium sekundum tipi
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM611363BTNTvalidated
OMIM614089BTNTvalidated
OMIM614430NTBTvalidated
ICD-10Q21.1NTBTinclusionvalidated
ICD-11LA8E.1Especificvalidated
MONDO0020434Evalidated
UMLSC0344724Evalidated
GARD5865Evalidated
MedDRA10031303Evalidated

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 (1):

No children.

4

Genes

9 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
TBX20Disease-causing germline mutation(s) (gain of function) inAssessedHGNC:11598ENSG000001645326060617p14.2T-box transcription factor 2019762328[PMID]
TBX20Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:11598ENSG000001645326060617p14.2T-box transcription factor 2019762328[PMID]
ACTC1Disease-causing germline mutation(s) inAssessedHGNC:143ENSG0000015925110254015q14actin alpha cardiac muscle 117947298[PMID]
CITED2Disease-causing germline mutation(s) inAssessedHGNC:1987ENSG000001644426029376q24.1Cbp/p300 interacting transactivator with ED-rich tail 216287139[PMID]
GATA4Disease-causing germline mutation(s) inAssessedHGNC:4173ENSG000001365746005768p23.1GATA binding protein 412845333[PMID]_15810002[PMID]_20347099[PMID]
GATA6Disease-causing germline mutation(s) inAssessedHGNC:4174ENSG0000014144860165618q11.2GATA binding protein 620631719[PMID]
MYH6Disease-causing germline mutation(s) inAssessedHGNC:7576ENSG0000019761616071014q11.2myosin heavy chain 615735645[PMID]
NKX2-5Disease-causing germline mutation(s) inAssessedHGNC:2488ENSG000001830726005845q35.1NK2 homeobox 521285290[PMID]_15810002[PMID]
TLL1Disease-causing germline mutation(s) inAssessedHGNC:11843ENSG000000382956067424q32.3tolloid like 118830233[PMID]
5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

35 annotations · validated 2020-03-10
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012382Left-to-right shunt
Frequent (79-30%)
HP:0003546Exercise intolerance
HP:0002875Exertional dyspnea
HP:0012378Fatigue
HP:0001962Palpitations
HP:0030718Right atrial enlargement
HP:0031664Systolic heart murmur
Occasional (29-5%)
HP:0005162Abnormal left ventricular function
HP:0001633Abnormal mitral valve morphology
HP:0011675Arrhythmia
HP:0005110Atrial fibrillation
HP:0004749Atrial flutter
HP:0005957Breathing dysregulation
HP:0011710Bundle branch block
HP:0001635Congestive heart failure
HP:0002094Dyspnea
HP:0011705First degree atrioventricular block
HP:0001653Mitral regurgitation
HP:0012764Orthopnea
HP:0010741Pedal edema
HP:0002092Pulmonary arterial hypertension
HP:0005133Right ventricular dilatation
HP:0012250ST segment depression
HP:0005115Supraventricular arrhythmia
HP:0004755Supraventricular tachycardia
HP:0005180Tricuspid regurgitation
Very rare (<4-1%)
HP:0006536Airway obstruction
HP:0000961Cyanosis
HP:0005317Increased pulmonary vascular resistance
HP:0002090Pneumonia
HP:0002718Recurrent bacterial infections
HP:0001708Right ventricular failure
HP:0001297Stroke
HP:0001279Syncope
HP:0002326Transient ischemic attack

Run the differential on the 1 obligate / very frequent terms

Annotation source: 21505579[PMID]_29250321[PMID]_30799379[PMID]_30305954[PMID]_30571061[PMID]

7

Sources for this card