1. The Association of Transcatheter Aortic Valve Replacement Availability and Hospital Aortic Valve Replacement Volume and Mortality in the United States 
J. Matthew Brennan, MD, MPH, David R. Holmes, MD, Matthew W. Sherwood, MD, Fred H. Edwards, MD, John D. Carroll, MD, Fred L. Grover, MD, E. Murat Tuzcu, MD, Vinod Thourani, MD, Ralph G. Brindis, MD, David M. Shahian, MD, Lars G. Svensson, MD, Sean M. O’Brien, PhD, Cynthia M. Shewan, PhD, Kathleen Hewitt, James S. Gammie, MD, John S. Rumsfeld, MD, PhD, Eric D. Peterson, MD, MPH, Michael J. Mack, MD 
The Annals of Thoracic Surgery 
Volume 98, Issue 6, Pages (December 2014)
DOI: /j.athoracsur
Copyright © 2014 The Society of Thoracic Surgeons Terms and Conditions

2. Fig 1
Temporal trends in aortic valve replacement (AVR) procedure volumes show a modest increase in surgical aortic valve replacement (SAVR) volumes (long-dashed gray line), with significant increases in transcatheter aortic valve replacement (TAVR) volumes (short-dashed gray line) and total AVR procedure volumes (solid black line), during the study period.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2014 The Society of Thoracic Surgeons Terms and Conditions

3. Fig 2
Temporal trends in aortic valve replacement (AVR) procedure case volumes at transcatheter aortic valve replacement (TAVR) centers and no-TAVR centers display substantial increases in procedural volume at TAVR centers (solid line = overall surgical aortic valve replacement [SAVR]; dashed line = overall TAVR) and modest increases in procedural volume at no-TAVR centers (solid line).
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2014 The Society of Thoracic Surgeons Terms and Conditions

4. Fig 3
Temporal trends: (A) Observed in-hospital mortality after surgical aortic valve replacement (SAVR); in all risk groups (solid line = high risk; long-dashed line = intermediate risk; short-dashed line = low risk), there was a decline in observed in-hospital mortality over the study period. (B) Observed to expected (O:E) mortality ratio for SAVR; in all risk groups (solid line = high risk; long-dashed line = intermediate risk; short-dashed line = low risk), there was a decline in O:E mortality ratios over the study period.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2014 The Society of Thoracic Surgeons Terms and Conditions