A 45-year-old woman underwent a modified radical mastectomy 4 years ag0. She was treated for multiple bone metastasis with cyclophosphamide, doxorubicin, and fluororacil for 6 months. She is complaining of exeion on exercise, swelling of the legs, and swelling around eyes in the morning. On examination, she has bilateral rales in the lungs, s1, s2 audible, s3, s5 gallop present. Her BP is 149/117 mm Hg, PR is 80/min, RR is 18/min. what is the most likely cause for her cardiac condition?