Purpose: Myocardial ischemic memory can be evaluated by post-systolic shortening (PSS) because it persists for a while after brief ischemia. Recently, early systolic lengthening (ESL) assessed by speckle tracking echocardiography has been reported to be a novel useful parameter for detecting myocardial ischemia. However, it is still unclear whether ESL persists after brief ischemia and can be used for evaluating ischemic memory. Subjects and Methods: The left circumflex coronary artery was occluded for 2 minutes followed by reperfusion in 16 dogs. Short-axis images were acquired at baseline, during occlusion, and 10 and 30 minutes after reperfusion. Circumferential strain was analyzed in the ischemic and non-ischemic areas. Peak systolic strain (εS), post-systolic index (PSI) as a parameter of PSS, the amplitude of ESL (εESL), and time from the onset of QRS to the beginning of regional contraction over the initial length (ESL time) were measured. Diagnostic accuracy for evaluating ischemic memory after reperfusion was calculated by receiver operating characteristics (ROC) curve analysis. Results: In the risk area, εS decreased and εESL increased during occlusion, which recovered to the baseline level after reperfusion. In contrast, PSI and ESL time significantly increased during occlusion, and the significant increase still persisted at 10 minutes after reperfusion (PSI: 0.02 ± 0.04 vs. 0.19 ± 0.10, p<0.05; ESL time: 88 ± 30 vs. 118 ± 38 ms, p<0.05). The sensitivity and specificity of ischemic memory at 10 minutes after reperfusion were 63% and 81% for ESL time, and 94% and 94% for PSI, respectively. Conclusion: ESL time derived from speckle tracking echocardiography seems to be able to detect ischemic memory. However, PSI was better than ESL time in terms of diagnostic accuracy of ischemic memory.