Evaluation of early doxorubicin-induced cardiotoxicity by means of systolic time intervals.
Systolic time intervals (PEP/LVET ratio) were used for detection of acute variations in myocardial contractility after a single dose of 30, 60, or 75 mg of doxorubicin/m2. This drug induces an acute impairment of left ventricular function (increase in the PEP/LVET ratio) detectable 1 h after doxorubicin injection. The phenomenon appears to be dose-related, with a threshold dose of 30-40 mg/m2. The decrease in myocardial contractility is fully reversible within 24 h, at least after the first dose. This kind of evaluation appears applicable to phase I studies of new anthracycline derivatives.
D004305:Dose-Response Relationship, Drug; D004317:Doxorubicin / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D004562:Electrocardiography; D005260:Female; D006331:Heart Diseases / Q000139:chemically induced*; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects*; D013599:Systole / Q000187:drug effects*; D013997:Time Factors
D004317:Doxorubicin