title: Possible enhancement of the cardiotoxicity of doxorubicin when combined with mitomycin C.
abstract: Forty-six patients with recurrent metastatic breast cancer were treated with a combination chemotherapy including doxorubicin and mitomycin C. Myocardial contractility was monitored by means of echocardiography. During therapy there was a progressive deterioration of myocardial function, and this phenomenon was found to be linearly correlated to the cumulative dose of doxorubicin. Six patients (13.8%) developed congestive heart failure during therapy; it occurred after the median cumulative dose of 322 mg/m2 (range 135-472). Possible risk factors of cardiomyopathy could be identified in only two patients. These results suggest that mitomycin C could enhance the cardiotoxicity of doxorubicin.
mesh_terms: D000328:Adult; D000368:Aged; D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage / Q000009:adverse effects; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects* / Q000627:therapeutic use; D001943:Breast Neoplasms / Q000188:drug therapy*; D009202:Cardiomyopathies / Q000139:chemically induced*; D003131:Combined Modality Therapy; D004305:Dose-Response Relationship, Drug; D004317:Doxorubicin / Q000008:administration & dosage / Q000009:adverse effects; D004562:Electrocardiography; D005260:Female; D006333:Heart Failure / Q000139:chemically induced; D006801:Humans; D008297:Male; D008875:Middle Aged; D016685:Mitomycin; D008937:Mitomycins / Q000008:administration & dosage / Q000009:adverse effects; D009200:Myocardial Contraction / Q000187:drug effects; D009362:Neoplasm Metastasis
chemical_list: D000903:Antibiotics, Antineoplastic; D008937:Mitomycins; D016685:Mitomycin; D004317:Doxorubicin