Objective To explore the of clinical value of three-dimensional speckle tracking imaging（3D-STI）in evaluating the left ventricular function in patients with diabetic foot.Methods A total of 49 diabetes patients admitted to endocrinology department in our hospital were selected

they were divided into 27 cases as simple diabetic group and 22 cases as diabetic foot group（Wagner grade was 0～2）. In addition

29 healthy volunteers with matched age and sex were selected as normal control group. From apical four chamber view

used 3D-STI to measure overall longitudinal

radial and circular shrinkage peak strain（GLS

GRS

GCS）in left chamber of each group

and compared differences between the three parameters.Results Compared with normal control group

there were statistical differences in GLS

GCS and GRS values of diabetes group and diabetic foot group（all P<0.05）. Compared with diabetes group

the GLS

GCS

GRS values of diabetes foot group decreased

and there were statistical differences（all P<0.05）.Conclusion 3D-STI can be used to detect subclinical myocardial damages in patients with diabetes mellitus

and the left ventricular strain capacity in patients with diabetic foot decreased significantly. So 3D-STI technology can provide a basis for early clinical intervention.