ABSTRACT
Serial echocardiography to detect doxorubicin dose-related cardiotoxicity correlates poorly with endomyocardial biopsy-proven cardiotoxicity. To compare radionuclide ventriculography (RVG) and echocardiography for the assessment of left ventricular (LV) function in children with Hodgkin disease (HD) receiving doxorubicin, we studied 39 children with HD before radiotherapy, both early (≤ 2 adriamycin, bleomycin, vinblastine, and dacarbazine cycles) (group A; n=10) and late (≥ 6 adriamycin, bleomycin, vinblastine, and dacarbazine cycles) (group B; n=36) during treatment. Seven children were assessed twice. The patients underwent full clinical assessment, echocardiography, and RVG. In group A, LV ejection fraction (LVEF) was significantly lower when measured by RVG compared with echocardiography (P<0.05). Group B had lower LVEF compared with group A by echocardiography (P=0.09), and by RVG (P=0.000). Paired analysis of children studied early and late showed a significant drop in LVEF by echocardiography (58.7 ± 7.3 vs. 52 ± 52.44%; P=0.04) and RVG (51.4 ± 2.6% vs. 47.2 ± 3.1%; P=0.004). The cumulative dose of doxorubicin inversely correlated with RVG-measured LVEF (r=-0.531; P=0.001). No correlation was found between LVEF measured by RVG and echocardiography (r=0.217; P=0.25). Cardiotoxicity occurred early and at low cumulative doses of doxorubicin in children with HD. RVG was more sensitive than echocardiography in detecting early impairment of LV function. We recommend baseline and serial assessment of LV function by RVG in children with HD receiving doxorubicin.
