根据Stenkvist等人在1979年有关心脏糖苷与乳腺癌有很大关系的报道,美国马里兰贝塞斯达国立肿瘤研究所的Ahmad R Safa等于近几年观察证实,长期应用洋地黄的病人(一般因充血性心力衰竭)发生癌瘤者比同类没有应用洋地黄的病人为低。他们回顾性调查了40岁以上晚期癌瘤病人在医院的登记表127例病例中,仅9例(7.1％)在诊断为癌瘤之前用过洋地黄。据另一些调查, According to Stenkvist et al.’s report on heart glycosides and breast cancer in 1979, Ahmad R Safa of the National Institute of Oncology in Bethesda, Maryland, United States, confirmed in recent years that long-term use of digitalis patients (usually due to Patients with congestive heart failure and cancer were lower than those who did not use digitalis. They retrospectively investigated the use of digitalis in 9 patients (7.1%) of the 127 cases of patients with advanced cancer above 40 years of age in the hospital registration form. According to other surveys,