Congenital atransferrinemia is an extremely rare autosomal recessive disorder characterized by functional or quantitative deficiency of transferrin. This leads to a characteristic clinical picture that includes heart failure due to iron overload cardiomyopathy, severe anemia, as well as hepatic and endocrine dysfunction in early infancy. Although rare or may be underdiagnosed, congenital atransferrinemia is a treatable cause of infantile heart failure and iron overload cardiomyopathy. Therefore, it is important to keep this diagnosis as a possibility in childhood presentation of heart failure and anemia. Early diagnosis and timely treatment can prevent progressive myocardial dysfunction and recurrent heart failure. This article focuses on pathophysiology, diagnosis, genetics, and management of heart failure in congenital atransferrinemia.