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Figure 3 Scatter Graph of Per Capita Use of Echocardiography Imaging Services in 2004

Scatter graph of per capita use of echocardiography imaging services in 2004, by state (vertical axis), against the prevalence per capita of congestive heart failure (CHF) in each state (horizontal axis). Use data were taken from the Medicare Part B Physician/Supplier Procedure Summary Master File (see Methods section), total Medicare fee-for-service enrollment was taken from Medicare’s state/county managed care market penetration report, and CHF prevalence was taken from the Centers for Medicare and Medicaid Services Hierarchical Coexistent Conditions risk adjustment model. Enrollment was adjusted to match carrier service areas.