1. Evolution of mitral valve surgery: toward a totally endoscopic approach 
Jason E Felger, MD, W.Randolph Chitwood, MD, L.Wiley Nifong, MD, Don Holbert, PhD 
The Annals of Thoracic Surgery 
Volume 72, Issue 4, Pages (October 2001)
DOI: /S (01)

2. Fig 1
Schematic drawing of patient position and minithoracotomy approach for a minimally invasive mitral valve operation.
The Annals of Thoracic Surgery  , DOI: ( /S (01) )

3. Fig 2
Cross-section of thorax depicting camera, cross-clamp, and retractor placement.
The Annals of Thoracic Surgery  , DOI: ( /S (01) )

4. Fig 3
Consecutive patient cohorts comparing mean cross-clamp and perfusion times (white columns = cross-clamp times; solid columns = cerebral perfusion times.)
The Annals of Thoracic Surgery  , DOI: ( /S (01) )