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The article examines the association between hospital readmission and mortality rates for cardiac patients who were presented with clinical case of acute myocardial infarction, heart failure and pneumonia. It highlights the impact of quality of medical care provided by health care centers in resolving the risk associated with cardiac patients. The Centers for Medicare & Medicaid Services in the U.S. on the basis of a cohort analysis revealed that differences in performance of hospitals and diagnostic parameters implied by hospital were of immense use in determination of readmission rate and mortality rate of cardiac patients.

The article focuses on an observational study which estimated hospital-level 30-day risk-standardized mortality rates (RSMRs) for patients discharged with acute myocardial infarction (AMI). Administrative data and a validated risk model were used to evaluate 3,195,672 discharges in 2,755,370 patients discharged from nonfederal acute care hospitals in the U.S. between January 1, 1995 to December 31, 2006. A significant decrease was observed in the risk-standardized hospital mortality rate for Medicare patients discharged with AMI, as well as between-hospital variation.