The investigators use the cancer registration system of National Cheng Kung University Hospital to timely screen and evaluate those patients having breast cancer or lymphoma to enroll patients to participate in this clinical trial. The investigators planned an earlier initiation of Sacubitril/Valsartan treatment on breast cancer and lymphoma patients before the chemotherapy, and starting therapeutic intervention by Sacubitril/Valsartan once the heart damage sign appeared via novel echocardiography. The investigators aim to assess the protective and therapeutic benefit of cardioprotective drugs on the cardiotoxicity of anti-cancer therapy.