A rare congenital heart valve condition called a unicuspid valve occurs when a person is born with only one cusp on the aortic valve instead of the usual three.
Notes on verification
Confirmed by peer-reviewed case report and medical reference source describing the condition consistently. [tier=silver indep_score=0.925 clusters=2 claim_tier=notable]
Sources
- Bicuspid aortic valve - Overview - Mayo Clinic (seed:health_and_medicine)
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5566075/ (corroboration)
- https://www.icliniq.com/articles/heart-circulatory-health/unicuspid-aortic-valve (corroboration)