Introduction:
Incidence of heart failure (HF), specifically with preserved ejection fraction (HFpEF), is rising in the general population, yet is understudied. To provide a population-based estimate of HF in breast cancer (BC) survivors, we compared risk of HF in women with and without BC history in the Kaiser Permanente Northern California (KPNC) integrated health system.
Methods:
Data were extracted from KPNC electronic health records. All invasive BC cases diagnosed from 2005-2013 were identified and matched 1:5 with non-BC controls on birth year, race/ethnicity, and KPNC membership at BC diagnosis. Cox regression models assessed the hazard of HF by EF status: HFpEF (EF ≥ 45%), HF with reduced EF (HFrEF; EF < 45%), and unknown EF. Women with prior history of HF were excluded. Models were adjusted for factors known to affect BC risk or CVD and for prevalent CVD at BC diagnosis. We also examined case subgroups who received cardiotoxic chemotherapy, left-sided radiation therapy, and/or endocrine therapy, versus their controls.
Results:
A total of 14,804 women diagnosed with invasive BC and with no history of HF were identified and matched to 74,034 women without BC history. Women were on average 61 years at BC diagnosis and 65% white. Women with HFpEF were older and more likely to have hypertension (p<0.05). Among all cases vs. controls, there was increased risk of HFrEF (HR: 1.5, 95% CI: 1.18, 1.98) but not HFpEF or unknown EF (figure). Compared to their controls, women treated with chemotherapy were more than 3-times likely to develop HFrEF (HR: 3.26, 95% CI: 2.2, 4.8) and more than 1.5-times likely to develop HFpEF (HR=1.61, 95% CI: 1.15, 2.24). Women who received left-sided radiation therapy had nearly double the risk of developing HFrEF (HR=1.85, 95% CI: 1.20, 2.84). No associations were found among women who received endocrine therapy.
Conclusions:
Increased surveillance is warranted for women with BC receiving cardiotoxic chemotherapy for development of both HFrEF and HFpEF.
Esophageal neuroendocrine carcinoma presenting as a rare cause of dysphagia
