Systolic versus diastolic cardiac function variables during epirubicin treatment for breast cancer
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Anthracyclines are important in the treatment of numerous malignant diseases but the use is limited by a risk of heart failure (CHF). LVEF (left ventricular ejection fraction) measurements by radio-nuclide ventriculography with multiple gated acquisition (MUGA) is often used for cardiac monitoring. However, diastolic variables have been proposed as sensitive supplements. It was hypothesized that a change in diastolic filling variables measured by MUGA could identify individuals after epirubicin treatment (ET) in risk of developing heart failure. A retrospective analysis of registered raw data. Individuals completing high-dose ET for breast cancer were selected from a 2-year period. All had MUGA-scans performed prior to and after ET and were observed clinically for late development of CHF. Eleven of 34 individuals developed CHF. A significant LVEF-reduction was recorded after ET with only minor changes in diastolic parameters. Development of CHF was related to dose, entry-blood pressure and inversely to post-epirubicin LVEF. Risk of CHF was high if LVEF <50% (Hazard ratio 3.31). Epirubicin induces considerable decrease in LVEF and a high risk of CHF. The risk of CHF is significantly higher if LVEF is reduced after ET. Diastolic MUGA-variables seem to add little information to conventional measurements of LVEF.
KeywordsAnthracyclines Cardiotoxicity Diastolic function Epirubicin Heart failure
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