1. Mechanical versus biologic valves: Clicking engines or quiet electrics or hybrids? 
Lars G. Svensson, MD, PhD, Eugene H. Blackstone, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 150, Issue 6, Pages (December 2015)
DOI: /j.jtcvs
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1 Changing approach to operations performed on the aortic root.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

3. Figure 2
Computed tomography image of an attempted valve-in-valve insertion into a previous stentless valve replacement that has embolized to the distal aorta (arrow).
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

4. Clicking engines or quiet electrics or hybrids?
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions