Objective To use ultrasound 2 d spots tracking imaging techniques discussed completeness of left a conduction block patients subendocardial myocardial left ventricular systolic function.Methods Completeness left a conduction block of patients(CLBBB) 20 cases,normal controls were 20 patients,the long axis XinJian four cavity heart and two views of the cavity 2 d gray-scale dynamic image,the application of two-dimensional strain software measure left ventricular wall each segment subendocardial myocardial shr...