title: Mitral valve surgery for dilated cardiomyopathy with mitral regurgitation.
abstract: Outcomes of surgery for non-ischemic non-valvular dilated cardiomyopathy with associated mitral regurgitation were assessed in 8 consecutive patients who underwent 9 mitral valve operations between 2001 and 2004. Mitral valve replacement was performed when the coaptation depth exceeded 10 mm. Two patients initially underwent mitral valvuloplasty, and 6 underwent valve replacement. One patient had valve replacement soon after valvuloplasty. Transthoracic echocardiography was performed immediately before surgery, before discharge, and during follow-up. Transesophageal echocardiography was carried out intraoperatively to assess valvular and ventricular function. Postoperative mean functional class was significantly better than the preoperative value (2.4 +/- 0.7 vs. 3.3 +/- 0.7), and the improvement was sustained during follow-up (2.0 +/- 0.7). The ejection fraction and left ventricular end-diastolic dimension did not improve. One patient died without leaving hospital and two died during follow-up. The 2- and 4-year survival rates were 75.0% and 37.5%. Mitral valve surgery improved functional class without obvious changes in ejection fraction or left ventricular end-diastolic dimension.
authors.affiliation: Department of Cardiothoracic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan. machapon@med.nagoya-u.ac.jp
authors.forename: Masashi
authors.initials: M
authors.lastname: Toyama
authors.forename: Akihiko
authors.initials: A
authors.lastname: Usui
authors.forename: Tomonobu
authors.initials: T
authors.lastname: Abe
authors.forename: Hideki
authors.initials: H
authors.lastname: Oshima
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Akita
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ueda
mesh_terms: D000328:Adult; D000368:Aged; D002311:Cardiomyopathy, Dilated / Q000150:complications*; D005260:Female; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery*; D008944:Mitral Valve Insufficiency / Q000209:etiology / Q000601:surgery*; D016896:Treatment Outcome