Asian Cardiovasc Thorac Ann 2006;14:371-376
© 2006 Asia Publishing EXchange Ltd
Mitral Valve Surgery for Dilated Cardiomyopathy with Mitral Regurgitation
Masashi Toyama, MD,
Akihiko Usui, MD,
Tomonobu Abe, MD,
Hideki Oshima, MD,
Toshiaki Akita, MD,
Yuichi Ueda, MD
Department of Cardiothoracic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
For reprint information contact: Masashi Toyama, MD Tel: 81 52 744 2376 Fax: 81 52 744 2383 Email: machapon{at}med.nagoya-u.ac.jp, Department of Cardiothoracic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466–8550, Japan.
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.
Copyright © 2006 by the Asia Publishing EXchange Ltd.
