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TUESDAY, Oct. 14 (HealthDay News) -- More than half of Americans who undergo non-emergency artery-opening procedures for heart disease don't get the recommended cardiac stress tests beforehand, Medicare records show.
These tests pick out those patients who will benefit from procedures like angioplasty or stenting, and those who won't. But just 44 percent of patients in the new study got the test.
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"We didn't expect to find 100 percent, but we expected a much higher percentage than 44," said Dr. Rita F. Redberg, professor of medicine at the University of California, San Francisco, one author of a report in the Oct. 15 issue of the Journal of the American Medical Association.
Redberg was a member of a team that studied the medical records of almost 24,000 people who had what is formally called elective percutaneous coronary intervention (PCI) -- elective meaning they had no urgent need for a PCI, which most lay people know as angioplasty.
Guidelines generally say that a stress test -- in which a walk on a treadmill is done to test heart function -- should be performed in such cases. But the report found that just 44.5 percent of people in the study had stress tests before they underwent PCI. That percentage varied widely, not only geographically, but also by patient characteristics and the age of the doctor doing the PCI.
The regional incidence of stress testing varied from 22.1 percent to 70.6 percent, the researchers found, with doctors in the Northeast and Midwest performing best. Stress tests were less likely to be done for women, anyone 85 years of age or older, or someone having other illnesses, such as congestive heart failure, lung disease or rheumatic disease. Stress tests were more likely for someone treated by a doctor under the age of 40 or over the age of 70.
There are "multiple reasons" for the differing rates of stress testing, Redberg said. One reason is that the guidelines are not as clear as they might be.
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