1. Are older patients with mechanical heart valves at increased risk?
Roy G Masters, MD, Lloyd C Semelhago, MD, Andrew L Pipe, MD, Wilbert J Keon, MD 
The Annals of Thoracic Surgery 
Volume 68, Issue 6, Pages (December 1999)
DOI: /S (99)

2. Fig 1 Actuarial freedom from bleeding after aortic valve replacement.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2 Actuarial freedom from bleeding after mitral valve replacement.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

4. Fig 3
Actuarial freedom from thromboembolism after aortic valve replacement.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

5. Fig 4
Actuarial freedom from thromboembolism after mitral valve replacement.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )