Chen C-Y, Stevenson LW, Stewart GC, Seeger JD, Williams L, Jalbert JJ, Setoguchi S. Impact of baseline heart failure burden on post-implantable cardioverter-defibrillator mortality among medicare beneficiaries. J Am Coll Cardiol. 2013 May 28;61(21):2142-50. doi: 10.1016/j.jacc.2013.02.043