1. Long-term clinical results of mitral valvuloplasty using flexible and rigid rings: A prospective and randomized study 
Byung-Chul Chang, MD, Young-Nam Youn, MD, Jong-Won Ha, MD, Sang-Hyun Lim, MD, You-Sun Hong, MD, Namsik Chung, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 133, Issue 4, Pages (April 2007)
DOI: /j.jtcvs
Copyright © 2007 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
Actuarial survival. C ring, Carpentier ring group; D ring, Duran ring group.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2007 The American Association for Thoracic Surgery Terms and Conditions

3. Figure 2
Actuarial survival according to preoperative left ventricular ejection fraction (gray line, actuarial survival of general population matched by age and sex). EF, Ejection fraction.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2007 The American Association for Thoracic Surgery Terms and Conditions

4. Figure 3
Freedom from reoperation. C ring, Carpentier ring group; D ring, Duran ring group.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2007 The American Association for Thoracic Surgery Terms and Conditions

5. Figure 4
Freedom from recurrence of significant mitral regurgitation (MR; grade ≥3). C ring, Carpentier ring group; D ring, Duran ring group.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2007 The American Association for Thoracic Surgery Terms and Conditions