1. Surgery for aortic and mitral valve disease in the United States: A trend of change in surgical practice between 1998 and 2005 
Scott D. Barnett, PhD, Niv Ad, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 137, Issue 6, Pages (June 2009)
DOI: /j.jtcvs
Copyright © 2009 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1 Annual changes in primary valve repair and procedure rates.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2009 The American Association for Thoracic Surgery Terms and Conditions

3. Figure 2
Estimated institution cost trends of primary aortic and mitral valve procedures from 2001–2004.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2009 The American Association for Thoracic Surgery Terms and Conditions