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. Author manuscript; available in PMC: 2016 Apr 12.
Published in final edited form as: Med Care. 2012 Jan;50(1):10–17. doi: 10.1097/MLR.0b013e3182293510

Figure.

Figure

Location of low-use hospital referral regions, 2006–2007. The dark blue areas indicate HRRs in the lowest quintile (i.e., bottom 20% of HRRs) of ICD/CRT-D utilization among study cohort heart failure patients during 2006–2007. The light blue areas indicate HRRs in the second lowest quintile of ICD/CRT-D utilization among study cohort heart failure patients during 2006–2007. Abbreviations: ICD/CRT-D—implantable cardioverter defibrillator/cardiac resynchronization therapy defibrillator; HRR—hospital referral region.