Inclusion Criteria:  -Male and female patients over the age of 18 who have received at least moderate (100mg/m2) anthracycline chemotherapy as a child (<16 years).  Exclusion Criteria:  patients born with complex heart disease patients who would not be safely able to have a magnetic resonance imaging scan patients who cannot give consent patients under the age of 18 or who have had less than a moderate dose of anthracycline