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RI Hospital researchers find common test may be unnecessary for bariatric surgery candidates
Date:7/19/2011

rweight patients are often difficult to image. Stress-only imaging significantly reduces the time required, radiation exposure, and cost associated with the test. Second, the study findings show that the incidence of abnormal MPI studies was low, and associated with a very low incidence of death or cardiac events at one-year follow-up, with less than 1 percent incidence of death from all causes or incidence of coronary revascularization, and there were no myocardial infarctions. Third, the perioperative cardiovascular events were extremely low, despite the high prevalence of risk factors for coronary artery disease.

Arrighi says, "Overall SPECT MPI findings were normal in 89 percent and equivocal in six percent of the patients. The incidence of abnormal findings on MPI was only 5 percent. While stress testing in this patient population has been a relatively common practice with good cause, the findings of this study suggest that these tests may not be indicated in all patients."

He concludes, "The results of our study suggest that this patient population is actually at very low risk for cardiovascular events, and if this is indeed the case, the routine preoperative stress testing with MPI for the detection of CAD may be unlikely to affect outcome. Additional studies are needed, however, to determine how higher-risk patients should be selected for pre-operative noninvasive risk stratification."


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Contact: Nancy Cawley Jean
njean@lifespan.org
Lifespan
Source:Eurekalert  

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