Do Semi-Rigid Prosthetic Rings Affect Left Ventricular Function After Mitral Valve Repair?
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概要
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Background: After reports of cardiac impairment caused by mitral annuloplasty with rigid rings, several prosthetic rings with semi-rigidity were introduced. The influence of semi-rigid rings on postoperative cardiac function remains unknown. This study compared postoperative cardiac function between patients receiving a semi-rigid prosthetic ring and those receiving a flexible ring or band. Methods and Results: Transthoracic echocardiographic data of 305 patients who underwent mitral valve repair for degenerative mitral regurgitation (227 patients receiving a semi-rigid ring and 78 receiving a flexible ring or band) were retrospectively reviewed. The imbalance in the preoperative characteristics between groups was adjusted with propensity score matching. Left ventricular ejection fraction, end-diastolic dimension, and end-systolic dimension were compared at 1 week, 6 months, and 1 year after surgery. Propensity score matching yielded 68 matched pairs of patients for whom there were few group differences in preoperative covariates. Between patients receiving a semi-rigid ring and those receiving a flexible ring or band in the propensity-matched cohorts, there were no significant differences in ejection fraction (P=0.322), end-diastolic dimension (P=0.576), or end-systolic dimension (P=0.567). Conclusions: There was little difference in the influence on postoperative cardiac function between semi-rigid rings and flexible rings or bands.
著者
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Takanashi Shuichiro
Department Of Cardiovascular Surgery Sakakibara Heart Institute
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Kasegawa Hitoshi
Department Of Cardiovascular Surgery Sakakibara Heart Institute
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Fukui Toshihiro
Department Of Cardiovascular Surgery Bell Land General Hospital
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Shimokawa Tomoki
Department Of Cardiovascular Surgery Sakakibara Heart Institute
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Manabe Susumu
Department Of Cardiothoracic Surgery Graduate School Of Medicine Tokyo Medical And Dental University
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Shinozaki Tomohiro
Department of Biostatistics, University of Tokyo
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Tabata Minoru
Department of Angiology and Cardiology, Kitasato University Graduate School of Medical Sciences
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Manabe Susumu
Department of Cardiovascular Surgery, Teikyo University Hospital
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