title: A reoperation of thrombosed On-X valve detected by multidetector-row computed tomography.
abstract: A 62-year-old female patient underwent mitral valve replacement with a 31/33-mm On-X valve for ischemic mitral valve regurgitation. Three months later, transthoracic echocardiography incidentally showed a blocked leaflet with 6 mmHg of mean pressure gradient and 2.4 cm(2) of mitral valve orifice area. Transesophageal echocardiography could not detect thrombus. Electrocardiographically gated multidetector-row computed tomography (MDCT) clearly demonstrated a blocked leaflet in the close position and thrombus (2 cm in length, 0.4 cm(2) in area) attached onto the atrial aspect of the leaflet. These findings observed by MDCT were confirmed at reoperation. MDCT was useful diagnostic method for visualizing prosthetic valve thrombosis.
authors.affiliation: Cardiovascular Surgery, Chikamori Hospital Heart Center, 1-1-16 Ohkawasuji, Kochi, 780-8522, Japan. tesshiaby@chikamori.com.
authors.forename: Hideki
authors.initials: H
authors.lastname: Teshima
authors.affiliation: Cardiovascular Surgery, Chikamori Hospital Heart Center, 1-1-16 Ohkawasuji, Kochi, 780-8522, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Ikebuchi
authors.affiliation: Cardiovascular Surgery, Chikamori Hospital Heart Center, 1-1-16 Ohkawasuji, Kochi, 780-8522, Japan.
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Sano
authors.affiliation: Cardiovascular Surgery, Chikamori Hospital Heart Center, 1-1-16 Ohkawasuji, Kochi, 780-8522, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Kinugasa
authors.affiliation: Cardiovascular Surgery, Chikamori Hospital Heart Center, 1-1-16 Ohkawasuji, Kochi, 780-8522, Japan.
authors.forename: Ryuta
authors.initials: R
authors.lastname: Tai
authors.affiliation: Cardiovascular Surgery, Chikamori Hospital Heart Center, 1-1-16 Ohkawasuji, Kochi, 780-8522, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Irie
mesh_terms: D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006083:Graft Occlusion, Vascular / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery*; D061330:Multidetector Computed Tomography; D012086:Reoperation; D013927:Thrombosis / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery
keywords: Mechanical valve; Multidetector-row computed tomography; Prosthetic valve thrombus