1. Volume 11, Issue 2, Pages 216-221 (February 2014)
Mortality risk following replacement implantable cardioverter-defibrillator implantation at end of battery life: Results from the NCDR® 
Daniel B. Kramer, MD, Kevin F. Kennedy, MS, John A. Spertus, MD, MPH, Sharon-Lise Normand, PhD, Peter A. Noseworthy, MD, Alfred E. Buxton, MD, Mark E Josephson, MD, Peter J. Zimetbaum, MD, Susan L. Mitchell, MD, MPH, Matthew R. Reynolds, MD, MSc 
Heart Rhythm 
Volume 11, Issue 2, Pages (February 2014)
DOI: /j.hrthm
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2. Figure 1
All patients entered into the ICD Registry from January 2005 to March 2010 were eligible. Those who only received initial ICD implants and those without usable Social Security numbers were excluded. For patients receiving replacement ICDs, those whose reason(s) for replacement did not include end of expected battery life also were excluded.
Heart Rhythm  , DOI: ( /j.hrthm )
Copyright © 2014 Heart Rhythm Society Terms and Conditions

3. Figure 2
Unadjusted Kaplan–Meier curve for survival for patients receiving replacement ICDs, with the number at risk at yearly intervals of follow-up provided.
Heart Rhythm  , DOI: ( /j.hrthm )
Copyright © 2014 Heart Rhythm Society Terms and Conditions