Objectives: The use of anthracyclines are limited by their cardiotoxic side effects (first of all congestive cardiomyopathy). In this study we analyzed the anthracycline-induced cardiotoxicity and the possible preventive role of dexrazoxane in children.
Patients: 158 anthracycline-treated long-term survivors could be analyzed. Sixty-one children received dexrazoxane (group D) and 97 patients received anthracyclines only (group C).
Methods: Cardiac ultrasound examinations (ECHO) and electrocardiograms (ECG) were performed regularly from the beginning of chemotherapy and yearly thereafter. Shortening fraction (FS) was used as indicator of the ventricular function.
Results: The incidence of reduced left ventricular function (FS) was 13.4% in C, and 8.2% in D (p=ns). Two years after completion of the chemotherapy FS was reduced in 13.7% in C and 0% in D, respectively (p=0.056), and 5 years after therapy in 11.0% in C and 2.4% in D, respectively (P=0.034). Left chamber wall diameter was abnormal in systole in 6% in C and 2% in D, in diastole in 11% in C and 7% in D (p=ns) after 3 years of follow-up.
Conclusion: Anthracycline-induced subacute cardiotoxicity can be significantly diminished by the concomitant use of dexrazoxane. For the final conclusions longer follow-up is necessary.
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