1. Augmentation Index Is Elevated in Aortic Aneurysm and Dissection
Yasushige Shingu, MD, Norihiko Shiiya, MD, PhD, Tomonori Ooka, MD, PhD, Tsuyoshi Tachibana, MD, PhD, Suguru Kubota, MD, PhD, Satoshi Morita, PhD, Yoshiro Matsui, MD, PhD 
The Annals of Thoracic Surgery 
Volume 87, Issue 5, Pages (May 2009)
DOI: /j.athoracsur
Copyright © 2009 The Society of Thoracic Surgeons Terms and Conditions

2. Fig 1
Representative diameter change waveform and calculation formula of augmentation index. Diameter of first inflection point is defined as D1 and the next peak as D2. (AI = augmentation index; Dmax and Dmin = maximum and minimum diameter.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2009 The Society of Thoracic Surgeons Terms and Conditions

3. Fig 2
Relationship between AI and age. By regression analysis in groups A and C, the coefficient of age was (95% confidential interval: to 1.462) and its p value was less than (AI = augmentation index; ○ = group A; ● = group B; □ = group C.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2009 The Society of Thoracic Surgeons Terms and Conditions