RESUMO
Anthracycline-based chemotherapy is widely used in the management of breast cancer. Despite the lack of clinical evidence, obtaining prechemotherapy left ventricular ejection fraction (LVEF) by echocardiogram or multigated acquisition scan is a widely adopted practice throughout the world. We present here the results of a retrospective analysis of breast cancer patients who had LVEF measurements in anticipation of an anthracycline chemotherapy to determine whether predefined cardiac risk factors predicted for poor cardiac function. Retrospective data were analyzed from 482 female breast cancer patients in whom LVEF was measured before starting anthracycline-based chemotherapy. Baseline demographics and multiple risk factors associated with congestive heart failure were collected. Twenty-six possible risk factors for CHF were defined, and the frequency of finding an abnormal LVEF as a function of total risk factors was assessed. Statistical tests include chi-squared and logistic regression analysis. The median age of the study population was 52 years. The original chemotherapy plan was changed in 7 patients (1.45%) based on LVEF findings, all of which had asymptomatic LV dysfunction (LVEF ranging 40%-50%). In 32 patients, despite normal LVEF results, anthracyclines were omitted secondary to prior cardiac issues. In 17 patients where LVEF was reported normal, anthracyclines were skipped based on patient's preference, tumor characteristics, or upstaging of the cancer based on imaging studies. No patient with ≤2 risk factors had an abnormal LVEF (N = 350). The probability of finding an abnormal LVEF in patients without any cardiac risk factors is extremely rare. Skipping baseline LVEF assessment may be an option in some patients with no cardiac risk factors undergoing anthracycline-based chemotherapy.