According to background information, more than 280,000 Medicare enrollees are admitted to hospitals with AMI annually. "These patients face a high risk of short-term death: 18 percent die within 30 days of admission," the authors write. "Much of the effort to reduce this high mortality rate has focused on invasive diagnostic and therapeutic interventions." The authors continue, "Noninvasive, inexpensive, medical management, including aspirin, angiotensin-converting enzyme inhibitors [ACE inhibitors], and beta-blockers [medications used to treat high blood pressure], as well as thrombolysis [therapy to reduce blood clots], reduces mortality (death) following AMI."
Therese A. Stukel, Ph.D., from Dartmouth Medical School, Hanover, N.H., and colleagues analyzed data from 158,831 elderly Medicare patients hospitalized with a first episode of confirmed AMI in 1994 1995, followed up for 7 years. The researchers examined the intensity of invasive management (measured as whether the patients received a cardiac catheterization within 30 days), and medical management (measured by prescription of beta-blockers to appropriate patients at discharge from hospital).
The researchers found that the patients' initial AMI severity was similar across all regions. "In all regions, younger and healthier patients were more likely than older high-risk patients to receive intensive treatment and medical therapy," the researchers note. "Regions with more invasive treatment practice styles had more cardiac catheterization laboratory capacity; patients in these regions were more likely to receive intervention
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