Prolonged trastuzumab therapy in a patient with recurrent breast cancer and anthracycline-induced cardiac failure.

Current practice precludes patients with pre-existing cardiac dysfunction from trastuzumab therapy. A 57-year-old patient with HER2 positive metastatic breast cancer and anthracycline-induced cardiac failure was safely treated with trastuzumab. At 46 months, left ventricular ejection fraction (LVEF) did fall to 38.