1. Is the bentall procedure for ascending aorta or aortic valve replacement the best approach for long-term event-free survival? 
Christian Hagl, MD, Justus T Strauch, MD, David Spielvogel, MD, Jan D Galla, MD, PhD, Steven L Lansman, MD, PhD, Rafael Squitieri, MD, Carol A Bodian, DrPh, Randall B Griepp, MD 
The Annals of Thoracic Surgery 
Volume 76, Issue 3, Pages (September 2003)
DOI: /S (03)00568-X

2. Fig 1
Kaplan-Meier curve of survival of all patients after the Bentall operation (solid line). Overall survival is 0.95 (95% confidence intervals, 0.9 to 0.99) at 5 years and 0.93 (95% confidence intervals, 0.86 to 0.99) at 8 years. Shown for comparison is an age-matched and sex-matched curve for the US population (dotted line).
The Annals of Thoracic Surgery  , DOI: ( /S (03)00568-X)

3. Fig 2
Kaplan-Meier curves of event-free survival among the 142 patients who underwent a Bentall operation. Events include endocarditis, need for ascending aorta reoperation, stroke, or significant thromboembolic or bleeding complications (requiring hospitalization). Event-free survival is 0.85 (95% confidence intervals, 0.78 to 0.92) at 5 years and 0.78 (95% confidence intervals, 0.68 to 0.88) at 8 years.
The Annals of Thoracic Surgery  , DOI: ( /S (03)00568-X)