ROLE OF 2D SPECKLE TRACKING (STE) AND 4D ECHOCARDIOGRAPHY IN THE ASSESSMENT OF LEFT VENTRICULAR SYSTOLIC FUNCTION IN TYPE II DIABETIC PATIENTS WITH NEGATIVE MYOCARDIA PERFUSION IMAGING IN CORRELATION TO MUGA SCAN., Taghreed A. Ahmed, Mona H, Taher Said, INTERNATIONAL JOURNAL OF PURE MEDICAL RESEARCH : Volume-8 | Issue-2 | February-2023