A rare congenital heart valve condition called a quadricuspid valve occurs when a person is born with four cusps on the aortic valve instead of the usual three.
Sources
- Bicuspid aortic valve - Overview - Mayo Clinic (mayoclinic.org)
- https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.115.017743 (ahajournals.org)
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6481097/ (ncbi.nlm.nih.gov)
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10290899/ (ncbi.nlm.nih.gov)
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