An unusual heart failure: cardiac amyloidosis due to light-chain myeloma.

Cardiac amyloidosis is a rare disorder in which the diagnosis requires specific clinical suspicion, especially in the case of heart failure without history of traditional cardiovascular risk factors. Light-chain myeloma, with its characteristic hypogammaglobulinemia, absence of abnormal band on serum electrophoresis, and light-chain proteinuria, may be a cause of cardiac amyloidosis