ROLE OF TWO-DIMENSIONAL SPECKLE TRACKING ECHOCARDIOGRAPHY FOR EVALUATION OF LEFT VENTRICULAR DYSFUNCTION IN ANTHRACYCLINE -INDUCED CARDIOTOXICITY IN BREAST CANCER PATIENTS. Journal title: International Journal of Advanced Research (IJAR) Authors: Wael A. Abdelmottaleb, Ahmed A. Wafa, Nader E. Awad, Mohammed S. Ahmed. Subject(s):