A new study from University of Chicago Medicine and published in JAMA Cardiology shows the overall rate of preoperative stress testing for hip and knee replacements is and has been decreasing consistently since 2006. Still, researchers found, 30,000 out of every 100,000 stress tests performed each year were unnecessary, as the tests didn’t decrease the frequency of complications such as heart attacks or stopped hearts.

Preoperative cardiac stress testing is used to assess the risk for heart problems, such as heart attacks, in patients scheduled for non-cardiac surgeries. Researchers analyzed the IBM Marketscan 2004-2017 Commercial and Medicare Supplemental Databases, which represent the health services of about 185 million employees, dependents and retirees in the United States.

“Stress testing is expensive. It can also delay the knee or hip replacement surgery and lead to other unnecessary tests that may not help a patient, overall.”

— Daniel Rubin, MD, Associate Professor of Anesthesia and Critical Care and the study’s first author

According to Rubin, cardiac stress testing was introduced prior to surgery to improve outcomes in patients who may be more likely to have heart attacks or stopped hearts. But over time, research has indicated that an increased amount of stress testing hasn’t led to a change in the outcomes of these patients.

And while most researchers who have studied this area agree that routine testing isn’t indicative of improved outcomes, many physicians continue to administer these tests in spite of existing guidelines to the contrary from the American College of Cardiology and American Heart Association, a media release from University of Chicago Medical Center explains.

“Even though there may be clear guidelines, you may find practitioners are unlikely to adhere to them because they don’t know the information, they have outdated guidelines, or they feel their experience is better attuned to a specific patient’s needs,” Rubin adds.

According to Rubin and co-authors, while there has been progress in reducing the number of tests since 2006, the study’s findings suggest a continued opportunity for educational initiatives to improve the utilization of medical resources and reduce costs associated with unnecessary testing.

[Source(s): University of Chicago Medical Center, Newswise]

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