1. Frailty as a risk predictor in cardiac surgery: Beyond the eyeball test 
Bobby Yanagawa, MD, PhD, FRCSC, Michelle M. Graham, MD, Jonathan Afilalo, MD, Ansar Hassan, MD, Rakesh C. Arora, MD, PhD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 157, Issue 5, Pages (May 2019)
DOI: /j.jtcvs
Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
Three-strikes model of frailty. Adapted with permission from Arora RC, Djaiani G, Rudolph JL. Detection, prevention, and management of delirium in the critically ill cardiac patient and patients who undergo cardiac procedures. Can J Cardiol. 2017;33:80-7.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

3. Three-strikes model of frailty. Adapted with permission.5
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions