Abstract
Two children with leukemia are presented, each demonstrating an unusual aspect of anthracycline-induced cardiomyopathy. In the first patient (a 7-month-old female with acute monocytic leukemia) extremely young age and previous chemotherapy with a podophyllotoxin derivative, VP-16, may have prediposed the patient to fatal congestive heart failure at a total Daunorubicin dose of only 225 mg/m2. In the second patient, a delay of 4 1/2 years was not sufficient in preventing congestive heart failure resulting from the administration of additional anthracycline chemotherapy. We conclude that extremely young age and, possibly, prior therapy with VP-16 may be addition risk factors in the development of anthracycline cardiomyopathy. Also, we suggest that once an anthracycline agent has reached a toxic threshold for the myocardium, the heart may always be at risk to injury from additional Adriamycin or Daunorubicin therapy.
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