Assessment of early cardiotoxic adverse effects of doxorubicin-containing regimens in breast cancer patients

Abstract Funding Acknowledgements Type of funding sources: Public hospital(s). Main funding source(s): 1. Tehran University of Medical Sciences 2. Iran University of Medical Sciences Assessment of early cardiotoxic adverse effects of Doxorubicin-containing regimens in breast cancer patients. Abstract: Introduction BC is the most prevalent cancer among women and comprises about 30% of cancers in this population group1. Numerous patients with breast cancer (BC) require cardiotoxic anthracycline-based chemotherapy. Purpose We intended to assess the early cardiotoxic effects of doxorubicin utilizing cardiac magnetic resonance (CMR) imaging. Methods Frothy-nine patients including 21 otherwise healthy females with BC at a mean age (±SD) of 47.62 ± 9.07 years and 28 normal controls at a mean age (±SD) of 45.18 ± 4.29 years were recruited. BC cases underwent both CMR and TTE at baseline and seven days after four biweekly cycles of Doxorubicin and Cyclophosphamide. Functional, volumetric, and strain parameters, including global longitudinal (GLS), circumferential (GCS), and radial strain (GRS), were analyzed. The findings compared with those of 28 controls. Results In post-chemotherapy CMR, four patients (19.04%) displayed evidence of drug cardiotoxicity. Ventricular ejection fraction, left ventricular end-systolic volume index, and strain values significantly changed after chemotherapy (all Ps < 0.05). One patient (4.76%) had myocardial edema in post-chemotherapy CMR, and three patients (14.28%) had evidence of myocardial fibrosis. In the follow-up time of 4 to 10 months (mean: seven months) after chemotherapy, eight patients (38.09%) complained of dyspnea on exertion and fatigue. None of the CMR parameters had any correlation with the evolution of symptoms. Conclusion We demonstrated a significant difference in ventricular ejection fraction and global strain values early after Doxorubicin chemotherapy. Exclusive CMR parameters can aid in the early initiation of preventive cardiac strategies.