title: Asymptomatic and isolated accessory mitral valve tissue in an adult.
abstract: Accessory mitral valve (AMV) tissue is a congenital anomaly that occurs in association with other congenital anomalies, and is an uncommon cause of left ventricular outflow tract obstruction. It is usually detected in early childhood when accompanied by symptoms of obstruction of the left ventricular outflow tract, and is rarely diagnosed in adults. We present a case of a 53-year-old man who was referred to our institution for evaluation of a systolic heart murmur. Echocardiography disclosed a diagnosis of AMV tissue. This case was uncommon because of the lack of severe obstruction of left ventricular outflow, cardiac symptoms, or other cardiac anomalies. We were able to carry out surgical resection of AMV tissue to avert possible progression of aortic insufficiency and the risk of a cerebrovascular embolization. The patient's postoperative course was uneventful, and postoperative echocardiography showed no residual accessory mitral tissue.
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan. khisatomi@nagasaki-u.ac.jp.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Hisatomi
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Hashizume
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Tanigawa
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Miura
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Seiji
authors.initials: S
authors.lastname: Matsukuma
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Shogo
authors.initials: S
authors.lastname: Yokose
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Mizuki
authors.initials: M
authors.lastname: Sumi
authors.affiliation: Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Kiyoyuki
authors.initials: K
authors.lastname: Eishi
mesh_terms: D000015:Abnormalities, Multiple; D006348:Cardiac Surgical Procedures / Q000379:methods*; D018450:Disease Progression; D004452:Echocardiography; D004621:Embolization, Therapeutic; D006350:Heart Valve Prosthesis; D006352:Heart Ventricles / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000002:abnormalities* / Q000601:surgery; D008944:Mitral Valve Insufficiency / Q000151:congenital* / Q000175:diagnosis / Q000601:surgery; D011184:Postoperative Period; D014057:Tomography, X-Ray Computed; D014694:Ventricular Outflow Obstruction / Q000151:congenital* / Q000175:diagnosis / Q000601:surgery
keywords: Accessory mitral valve tissue; Adult; Asymptomatic; Left ventricular outflow obstruction
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