What is Known:
•Paediatric dilated cardiomyopathy (DCM) is the commonest of the childhood cardiomyopathies, with significant associated morbidity and mortality.
•DCM is most commonly idiopathic.
What is New:
•Identifying the aetiology of DCM in the paediatric population aids risk stratification and prognostication.
•The first year after diagnosis of DCM is associated with significant mortality.