1. Cardiac surgery in the octogenarian: evaluation of risk, cost, and outcome 
G.James Avery, MD, S.Jill Ley, RN, J.Donald Hill, MD, James J Hershon, MD, Stuart E Dick, MPH 
The Annals of Thoracic Surgery 
Volume 71, Issue 2, Pages (February 2001)
DOI: /S (00)

2. Fig 1
Distribution of surgical procedures performed on octogenarians. (AVR = aortic valve repair; CABG = coronary artery bypass grafting; DVR = double value replacement; MVR = mitral valve repair.)
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

3. Fig 2
Distribution of surgical procedures performed on patients aged 65 to 75 years. (AVR = aortic valve repair; CABG = coronary artery bypass grafting; DVR = double value replacement; MVR = mitral valve repair.)
The Annals of Thoracic Surgery  , DOI: ( /S (00) )