Objective 1.To compare the accuracy of dobutamine stress echocardiography(DSE) to nitroglycerine(NTG) 99Tc m-MIBI(methoxglisobutylisonitrile) SPECT(single-photon emission computed tomography) in detecting chronic hibernating myocardium(CHM).

• 目的 (1)比较硝酸甘油介入 99Tcm-甲氧基异丁基异腈 (MIBI)单光子发射计算机断层心肌灌注显像 (SPECT)方法与多巴酚丁胺超声负荷试验 (DSE)对慢性冬眠心肌 (chronic hibernating myocardium,CHM)的检出率 ;