The Detection of Residual Ischemia and Stenosis in Patients With Acute Myocardial Infarction with Dobutamine Stress Echocardiography

摘要: The aim of this study was to validate the usefulness dobutamine stress echocardiography detect residual ischemia and significant stenosis at infarct zone in patients with acute myocardial infarction. Dobutamine thallium-201 single-photon emission computed tomography were performed on 40 consecutive 1 month after onset infused incrementally, wall motion score index calculated before peak infusion. divided into three groups according change (improved, unchanged, or worsened motion, respectively). Tomographic thallium images assessed visually. All underwent quantitative coronary angiography, defined as 50% greater stenosis. In who showed a persistent defect infarct-related artery, resting when possible. There significantly higher incidence (85%) unchanged (63%) than those improved (8%). artery more severe (worsened 82.6% ± 17.7%, 93.7% 12.6%, 37.1% 24.4%). use for detecting resulted sensitivity 93% specificity 91%, respectively. Worsened by strongly suggests ischemia. Conversely, less are associated motion. Unchanged sometimes indicates It may reflect hibernating myocardium, but prognostic significance finding should be determined revascularization.