Jang, Sae Heon

e19517 Background: Anthracycline-induced cardiotoxicity (AIC) is a well-known phenomenon, but event rates and predictors may not be as robust as commonly perceived. We performed a systematic review and meta-analysis to elucidate AIC definitions, incidence rates and predictors. Methods: 5323 reports were identified via searching Medline, Embase, and Scopus. Inclusion criteria for full text review included minimum of 100 lymphoma patients receiving ACs; median/mean follow up of at least 12 months; and specified evaluation of left ventricular ejection fraction. We investigated the definition, reported incidence, and predictors of AIC including subclinical AIC as detected by decrease in left ventricular systolic dysfunction. Meta-analysis was performed with Meta-analyst software with random effects model. Results: A total of 19 studies were included in the analysis. The overall incidence of AIC in 13926 patients was 13.8% (95% CI 4.8-22.8, I2 99.6% p < 0.001) at a mean/median follow-up ranging from 1 to 8 years. Subclinical AIC was seen in 8.2% of 5464 patients (95% CI 6.4 to 10%, I2 78.9%, p < 0.001) at a mean/median follow-up ranging from 1 to 20 years. Subclinical AIC is defined in most studies as asymptomatic decrease in LVEF by 10-15% from baseline of 50-55%. Older age, increasing AC dose or number of cycles, GLS (global longitudinal strain), and prior comorbidities such as CAD, HTN, DM and dyslipidemia were found to predict AIC. However, Heterogeneity was seen in definition of AIC, risk factor assessment and follow-up protocol, which limited the extent of correlative analyses for cardiotoxicity predictors. Conclusions: The overall incidence of clinical HF and subclinical AIC among lymphoma patients was 13.8% and 8.2% respectively. Older age, increasing AC dose or number of cycles, GLS, and prior comorbidities such as CAD, HTN, DM and dyslipidemia were found to predict AIC.

e23081 Background: Anthracycline-induced cardiotoxicity (AIC) is a well-known phenomenon, but the true incidence is poorly defined, and definitions of AIC in the literature are variable. We performed a systematic review and meta-analysis to elucidate AIC definitions and the incidence of clinical heart failure (HF) and subclinical AIC reported in adult breast cancer and lymphoma patients after anthracycline (AC) therapy. Methods: 3,428 abstract and titles were identified via PubMed search. Inclusion criteria for full text review included minimum of 100 adult patients receiving ACs; median/mean follow up of at least 12 months; and specified evaluation of left ventricular ejection fraction. Outcomes were divided into clinical HF and subclinical AIC. Meta-analysis was performed with MedCalc software with random effects model. Results: 366 full text articles were reviewed. 24 studies, including a total of 11,065 patients, reported clinical HF findings; 21 studies, including a total of 8,098 patients, reported subclinical AIC findings. Meta-analysis showed an overall incidence of clinical HF of 3.1% (range 0 to 29%, CI 1.9 to 4.6%, I2= 93.9%); an incidence of 2.0% (CI 0.9 to 3.6%, I2 = 91.6%) in breast cancer patients receiving AC; and 4.8% in lymphoma patients receiving AC (CI 2.1 to 8.6%, I2 = 93.6%). Subclinical AIC was seen in 13.8% overall patients (range 2 to 45%, CI 10.4 to 17.7%, I2= 95.3%); 10.3% of breast cancer patients (CI 7.0 to 14.3%, I2= 95.0%); and 19.8% of lymphoma patients (CI 12.3 to 28.6%, I2= 94.4%). Incidence of HF correlated with increasing age (r = 0.51, p = 0.06) and cumulative dose (r = 0.51 , p = 0.19). There was notable heterogeneity of AIC definitions between studies (Table). Conclusions: Cardiotoxicity is not uncommon among patients who receive AC, particularly at doses given for the treatment of lymphoma. However, there was considerable heterogeneity in HF incidences. More uniform criteria and precise estimates are needed to inform clinical practice and trials. [Table: see text]