Abstract
BACKGROUND: D-dimer is a sensitive biomarker for cancer-associated thrombosis, but little is known about its significance on cancer therapeutics-related cardiac dysfunction (CTRCD). METHODS: Consecutive 169 patients planned for cardiotoxic chemotherapy were enrolled and followed up for 12 months. All patients underwent echocardiography and blood test at baseline and at 3-, 6-, and 12 months. RESULTS: The patients were divided into two groups based on the level of D-dimer (>1.65 μg/ml or ≦ 1.65 μg/ml) at baseline before chemotherapy: high D-dimer group (n = 37) and low D-dimer group (n = 132). Left ventricular ejection fraction (LVEF) decreased at 3- and 6 months after chemotherapy in high D-dimer group [baseline, 65.2% (62.8-71.4%); 3 months, 62.9% (59.0-67.7%); 6 months, 63.1% (60.0-67.1%); 12 months, 63.3% (58.8-66.0%), p = 0.03], but no change was observed in low D-dimer group. The occurrence of CTRCD within the 12-month follow-up period was higher in the high D-dimer group than in the low D-dimer group (16.2 vs. 4.5%, p = 0.0146). Multivariable logistic regression analysis revealed that high D-dimer level at baseline was an independent predictor of the development of CTRCD [odds ratio 3.93, 95% CI (1.00-15.82), p = 0.047]. CONCLUSION: We should pay more attention to elevated D-dimer levels not only as a sign of cancer-associated thrombosis but also the future occurrence of CTRCD.