raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99099

Cor triatriatum sinister

Synonyms: Cor triatriatum sinistrum · Divided left atrium

Type
Morphological anomaly
Group
Disorder
Age of onset
Adult, Childhood, Infancy
Status
active

A rare, congenital, non-syndromic, heart malformation characterized by the presence of a thin, fibromuscular membrane subdividing the left atrium into an upper and lower chamber. The upper chamber receives blood from the pulmonary veins and the lower chamber is attached to the left atrial appendage. Therefore, the membrane blocks the orifice of the mitral valve and leads to obstruction of the left ventricular inflow. It may be asymptomatic or present in infancy with tachypnea, dyspnea, hemoptysis, chest pain, syncope, pulmonary edema, pulmonary hypertension, or heart failure, depending on the degree of obstruction. The anomaly may be isolated or associated with other congenital heart anomalies.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCor triatriatum sinisterCor triatriatum sinistrum · Divided left atrium
frCoeur triatrial gaucheCor triatriatum sinister · Division de l'atrium gauche · Division de l'oreillette gauche
deCor triatriatum sinisterGeteilter linker Vorhof
esCor triatriatum sinisterAurícula izquierda dividida · Cor triatriatum sinistrum
itCor triatriatum sinisterAtrio sinistro diviso · Cor triatriatum sinistrum
nlCor triatriatum sinisterCor triatriatum sinistrum · Verdeeld linkeratrium
ptCor triatriatum
plSerce trójprzedsionkowe lewePodzielony lewy przedsionek
csCor triatriatum sinisterCor triatriatum sinistrum · Rozdělená levá síň
ukТрьохпередсердне серце (ліве)Cor triatriatum sinistrum · Розділене ліве передсердя
zh左侧三房心左心房三间隔
trKor triatriatum sinisterBölünmüş sol atriyum · Kor triatriatum sinistrum

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q24.2NTBTattributedvalidated
ICD-11LA8G.0Especificvalidated
MONDO0020430Evalidated
UMLSC0344712Evalidated
GARD12484Evalidated

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

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET

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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card