1. The David V Valve-Sparing Root Replacement Provides Improved Survival Compared With Mechanical Valve-conduits in the Treatment of Young Patients With Aortic Root Pathology 
Jiro Esaki, MD, PhD, Bradley G. Leshnower, MD, Jose N. Binongo, PhD, Yi Lasanajak, MPH, LaRonica McPherson, RN, Michael E. Halkos, MD, Robert A. Guyton, MD, Edward P. Chen, MD 
The Annals of Thoracic Surgery 
Volume 102, Issue 5, Pages (November 2016)
DOI: /j.athoracsur
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

2. Fig 1
(A) Distribution of propensity scores: valve-sparing root replacement (VSRR [solid line]) and mechanical valve-conduit (MECH [dashed line]). (Left) Sample before matching; (Right) sample after matching. (B) Standardized differences: matched sample (light gray bars) and unmatched sample (dark gray bars). (AI = aortic insufficiency; AS = aortic stenosis; COPD = chronic obstructive pulmonary disease.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

3. Fig 2
Long-term survival of propensity score matched patients: valve-sparing root replacement (VSRR [solid line]) and mechanical valve-conduit (MECH [dashed line]). (CI = confidence interval.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

4. Fig 3
Freedom from reoperation on aortic root or aortic valve of propensity score matched patients: valve-sparing root replacement (VSRR [solid line]) and mechanical valve-conduit (MECH [dashed line]). (CI = confidence interval.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions