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Start free with EleplanCongenital left ventricular aneurysm
ORPHA:1055Malformation syndrome
What it is
A rare congenital non-syndromic heart malformation characterized by a bulging of the left ventricular wall, connected to the left ventricle by a wide neck (with a ratio of the connection to the body of the anomaly >1). The dimensions of aneurysms have been described as small as 0.5 cm in diameter and as big as 8x9 cm in size. Most frequent locations are the left ventricular apex and the perivalvular area. Aneurysms can be a- or dyskinetic or show almost normal contractility. Patients may remain asymptomatic or present with systemic embolization, congestive heart failure, valvular regurgitation, ventricular wall rupture, ventricular tachycardia, or sudden cardiac death.
Key facts
- Age of onset
- Antenatal, Neonatal
- Classified as
- Malformation syndrome
Recorded for the broader condition
- Prevalence
- >1 / 1000 (at birth, Canada)Rare congenital heart disease
Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.
Signs and symptoms
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
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.
Cross-references
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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