The maximum changing rate of CVIB (K) during DSE >1.3 was defined as viable myocardium,then the accuracy in identifying viable myocardium were compared among routine DSE,SPECT and DSE combined with IBS.

• 探索在DSE过程中；以CVIB最大变化率(K)>1.；3定义为存活心肌；检测其识别存活心肌的准确性；并与常规DSE、SPECT进行比较。