1. Exposure of the mitral valve by transecting the ascending aorta during aortic and mitral valve replacement 
V.R Machiraju, MD, Claudio A.B Lima, MD, Michael H Culig, MD, Robert D Bennett, MD, Navin S Thakur, MD 
The Annals of Thoracic Surgery 
Volume 69, Issue 2, Pages (February 2000)
DOI: /S (99)

2. Fig 1
Ascending aorta is transected, and both ends of the aorta are retracted apart. A vent is placed into the left ventricle through the proximal aorta.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2
Mitral valve is exposed, using the Cosgrove retractor, through the superior approach by opening the dome of the left atrium.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )