title: Quadricuspid aortic valve.
authors.affiliation: The James Cook University Hospital, Middlesbrough, UK r.o.jones@doctors.org.uk.
authors.forename: Richard O
authors.initials: RO
authors.lastname: Jones
authors.affiliation: The James Cook University Hospital, Middlesbrough, UK.
authors.forename: Simon Wh
authors.initials: SW
authors.lastname: Kendall
mesh_terms: D000368:Aged; D001021:Aortic Valve / Q000002:abnormalities* / Q000473:pathology* / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D019917:Blood Vessel Prosthesis Implantation; D002114:Calcinosis / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D006330:Heart Defects, Congenital / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D008297:Male