Department of Medicine, Laboratoire Toxicomed, University of Tlemcen, Department of Medical Oncology, CHU Tlemcen, Tlemcen, Algeria
Mohammed Alaeddine Saidi , Soumeyya Ghomari
Background: Multimodal approach in the adjuvant treatment of early breast cancer has led to a significant number of survivors. However, the combination of these treatments may increase the risk of long-term cardiotoxicity, particularly in the presence of cardiovascular risk factors (CVRF). Methods: We examined cardiac function in patients who had previously been treated for early breast cancer. Echocardiograms were performed at least 2 years after therapy. We measured left ventricular ejection fraction (LVEF) and reported pre-treatment LVEF and all CVRF. The initial Framingham Risk Score (FRS) has been calculated. Asymptomatic cardiotoxicity was defined by decrease of 5% or more in the LVEF value without clinical symptoms of CHF. Doxorubicin, Trastuzumab, Radiotherapy, older age, and CVRF (hypertension (HTN), diabetes, dyslipidemia, obesity, Waist circumference) were evaluated as potential risk factors for the development of cardiotoxicity. All statistical analysis was performed using SPSS version 25.0. Results: A total of 143 breast cancer survivors with a median age of 46 ± 10 years (range: 26-72) underwent Echocardiogram imaging after a median follow-up of 9,22 years (range: 2 - 22). 48 women were postmenopausal at diagnostic. 32,2% were obese. HTN was present in 15%, diabetes in 12%, and dyslipidemia in 12% of patients. ARA-II was the most used treatment of HTN (55%). 11,9% of patients were under statin therapy. FRS was low in 69%, moderate in 22% and high in 9% of patients. 4 patients had received endocrine therapy alone, none of whom developed cardiotoxicity. There was only one case of symptomatic cardiotoxicity. In the remaining 138 women who received multimodal treatment (Anthracyclines:100%, Docetaxel:62,9%, Endocrine therapy:72%, Trastuzumab:7%, Radiotherapy:83,2%), a statistical but non-clinically significant decrease was observed in LVEF (67.7 ± 3.6 to 65.4 ± 5.1, p < 0.001). 39 women (28,3%) developed asymptomatic cardiotoxicity. In multivariate analysis, factors that contributed to decreased LVEF were HTN (p = 0,006), diabetes (p = 0,008) and dyslipidemia (p = 0,03). Conclusions: The use of adjuvant therapy in breast cancer may increase long term cardiotoxicity particularly in survivors with CVRF. Long-term cardiac follow-up is essential in order to initiate cardioprotective therapy at the right time.
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