SummaryAnthracycline-containing chemotherapy can cause irreversible and progressive left ventricular dysfunction. Epirubicin, which is widely used for breast cancer chemotherapy, is an anthracycline that has less cardiac toxicity than doxorubicin. The present report describes the case of a 70-year-old woman with breast cancer who developed severe congestive heart failure and severe cardiac dysfunction at 6 weeks from epirubicin final administration. Left ventricular function gradually improved after intensive treatment for heart failure and recovered completely within 2 months. To the best of our knowledge, this is the first report to describe epirubicin-induced subacute reversible cardiotoxicity. (Int Heart J 2015; 56: 466-468) Key words: Anthracycline cardiac injury, Breast cancer A nthracycline chemotherapies are effective against a wide spectrum of malignancies, including lymphoma, gastric cancer, small cell lung cancer, sarcomas, and breast cancer.1) Commonly used anthracyclines include doxorubicin, daunorubicin, and epirubicin. Unfortunately, these agents also have the most well-recognized cardiotoxic profile among all cancer treatments, which often limits their utility.1) Cardiomyopathy induced by anthracyclines is characterized by a dose-dependent, symptomatic, or asymptomatic progressive reduction in ventricular systolic function, which often results in congestive heart failure.1) The cardiomyopathy can be acute, subacute, or late.1) Acute toxicities during or immediately after drug administration are generally rare. Subacute cardiomyopathy typically occurs up to 8 months after the final dose, with peak onset of symptoms at 3 months. Late cardiomyopathy presents 5 or more years after therapy with anthracyclines. The latter two presentations are usually irreversible and progressive.1) Early retrospective studies showed that subacute and late cardiomyopathy were associated with poor outcomes and a mortality rate greater than 40%. 1) Even though recent progress in the treatment of congestive heart failure has resulted in improved outcomes in affected individuals, the cardiotoxicity of anthracycline still limits its overall utility in the treatment of cancer.Epirubicin (4'-epidoxorubicin) was developed in an effort to identify an anthracycline with less cardiotoxicity.2) The cumulative dose of chemotherapy at which cardiotoxicity occurs is higher for epirubicin (900 to 1000 mg/m 2 ) than for doxorubicin (450 to 500 mg/m 2 ).2) Several studies have shown that epirubicin produces anti-tumor responses similar to doxorubicin, but is associated with a lower cardiotoxicity rate in women with breast cancer.2) Epirubicin-based adjuvant chemotherapy (fluorouracil 500 mg/m 2 , cyclophosphamide 500 mg/ m 2 , and epirubicin 100 mg/m 2 [FEC100]) is the most effective and standard epirubicin-based regimen for women with nodepositive breast cancer.
2,3)The present report describes a rare case of a female patient with breast cancer who developed severe cardiomyopathy and congestive heart failure after FEC100 followed b...