Prospective Observational Study in Patients With Metastatic Breast Cancer Treated With Anthracyclines

This is an open, multicentre, prospective observational (non-interventional) study, performed in Belgium. Principal objectives: 1. To evaluate the prevalence of cardiovascular risk factors and cardiac function (as routinely evaluated) before treatment with anthracyclines of patients with metastatic breast cancer (MBC) aged \> or = 65 years 2. To observe the management of cardiovascular risk during and after anthracycline treatment 3. To compare liposomal versus non-liposomal anthracycline therapy (ratio 1:1) on cardiac function, outcome and quality of life (EORTC QLQ-C30) Secondary objectives: 1. To evaluate the efficacy of anthracyclines on progression free survival and tumor response as routinely measured (e.g. recist criteria, tumor markers and other exams) 2. To evaluate cardiovascular event type: ECG changes, arrhythmia, decrease of ejection fraction, heart failure and rate according to allocated treatment. 3. To find out how quality of life, e.g. such as described according to EORTC QLQ-C30 criteria or Karnofsky index is achieved in the various patient subgroups 4. To correlate the therapeutic choice and posology of anthracyclines for MBC with Cardiovascular risk at baseline 5. To calculate the cardiovascular risk according to SCORE