This is an open label Phase II study in elderly patients (65y or older) with early breast cancer who are candidate for adjuvant chemotherapy. A scheme with liposomal doxorubicin (Caelyx) and cyclophosphamide (endoxan) will be used. The aim is to study the cardiac effects of liposomal doxorubicin with new non-invasive techniques, ie strain rate imaging, classical echocardiography, and special blood tests measuring troponin I and BNP.