Will a partial posterior annuloplasty ring prevent acute ischemic mitral regurgitation
作者： Tomasz A. Timek , Frederick Tibayan , George T. Daughters , Paul Dagum , Motoya Hayase
DOI: 10.1161/01.CIR.0000032873.55215.4C
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摘要: Background Acute posterolateral ischemia in sheep results ischemic mitral regurgitation (IMR). While complete ring annuloplasty prevents acute IMR, partial rings may offer a more physiologic repair, but are untested animal models of IMR. Methods Radiopaque markers were placed on the LV, annulus (MA), and leaflets 13 sheep. Seven served as controls, 6 had St. Jude Tailor flexible implanted (29 mm 5, 31 1). After 8±1 day, animals studied with biplane videofluoroscopy echocardiography before during LV (balloon occlusion circumflex artery). Mitral annular area (MAA), septal-lateral diameter (SL), perimeters, leaflet edge separation calculated from 3-D marker coordinates. Results The average degree increased 0.0±0.0 to 2.1±0.7 (P=0.0006) control group remained unchanged (0.1±0.2 for both condit...
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