Hanratty, Daniel Quadricuspid aortic valve. [electronic resource] - European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery Sep 2012 - 597 p. digital Publication Type: Case Reports; Journal Article ISSN: 1873-734X Standard No.: 10.1093/ejcts/ezs182 doi Subjects--Topical Terms: Aortic Valve--abnormalitiesAortic Valve Insufficiency--diagnostic imagingEchocardiography, Doppler--methodsFemaleFollow-Up StudiesHeart Valve ProsthesisHeart Valve Prosthesis Implantation--methodsHumansMiddle AgedPreoperative Care--methodsRisk AssessmentTreatment Outcome