Interventricular septum aneurysm

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Interventricular septum aneurysm

ORPHA:99092Morphological anomaly

What it is

Interventricular septum aneurysm is a rare, non-syndromic, congenital heart malformation characterized by the presence of a congenital aneurysm of the membranous portion of the interventricular septum. Patients may be asymptomatic or may present with ventricular or supraventricular tachycardia, fatigue, exertional dyspnea, palpitations, and cardiac murmur. Ventricular septal defects and conduction defects, such as first-degree atrio-ventricular block or incomplete right bundle branch block, may also be also associated.

Key facts

Classified as
Morphological anomaly

ICD-10 codes

Q21.0filed under a broader ICD-10 category — shared with 3 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

MESH C563239MONDO 0007112OMIM 105805UMLS C1387721

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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