A story by Robert Benincasa and Jennifer Brooks of the Gannett News Service shows that the best cardiac care is typically found in higher-income counties. "Using data provided by hospitals to the federal Centers for Medicare and Medicaid Services and covering the period of October 2004 through September 2005, GNS rated the nation's hospitals on heart care. The ratings show how often they gave standard treatments to heart attack and heart failure patients who were supposed to get them."
The data used for their analysis came from the US Department of Health and Human Services. It can be found here .