Abstract
Twenty-five million patients undergo noncardiac surgery annually in the United States; 50,000 sustain a perioperative myocardial infarction, and 20,000 die during or soon after surgery due to a cardiac event.1 Clinical information or the results of radionuclide or echocardiographic stress tests can be used to identify patients at high risk for developing a perioperative cardiac event during noncardiac surgery.2,3 For others, however, artifacts associated with the imaging process preclude acquiring the information necessary to assess preoperative cardiac risk.4 In patients who are not well suited for stress echocardiography, abnormalities of left ventricular (LV) myocardial thickening detected during dobutamine/atropine magnetic resonance imaging (DMRI)5 have been shown useful in identifying myocardial ischemia. This study examines the utility of DMRI stress testing for assessing preoperative cardiac risk in patients not well suited for stress echocardiography.
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