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Long-term effects of ibrutinib on blood pressure in patients with chronic lymphocytic leukemia (CLL).

e19009 Background: Ibrutinb is approved for treatment of CLL. Hypertension (HTN) has been reported as a side effect of ibrutinib in 1-23% of patients. We previously reported HTN in CLL patients after 6 months of treatment with ibrutinib. In this study we describe the effects of long-term treatment with ibrutinib on blood pressure (BP). Methods: We performed a retrospective study, evaluating 150 CLL patients on ibrutinib-based clinical trials from 2010 to 2015. Patient demographics, co-morbidities, tobacco use, anti-HTN therapy were recorded. BP was evaluated at baseline and sequentially for up to 5 yrs. New onset HTN was defined as systolic BP (SBP) of ≥ 130 mmHg and/or diastolic BP (DBP) ≥ 80 on two separate visits with no prior HTN or anti-HTN therapy. An increase in baseline SBP by ≥10 and/or increase in DBP by ≥10 was considered significant regardless of the absolute BP. Univariate logistic regression analysis was performed to assess relationship of HTN risk factors and new HTN. Results: Patients’ median age was 65 yrs (68% male and 88% white). Median follow-up was 3 yrs. Pre-existing HTN was present in 44% of patients, 40% were on anti-HTN therapy prior to ibrutinib. New HTN developed in 65% of patients without prior diagnosis of HTN; 32 % of patients were started on anti-HTN therapy or received additional anti-HTN therapy. Of the patients who experienced an increase in BP, 33% experienced isolated systolic HTN. Median SBP was 130 at baseline, 132 at 1mo, 137 at 3mo, 135 at 6mo, 139 at 12mo, 138 at 3yrs, 144 at 5yrs (mean increase in SBP: 7.2, P < 0.001). In patients whose SBP was < 130 at baseline the median SBP was 119 at baseline, 122 at 1mo, 134 at 3mo, 130 at 6mo, 134 at 12mo, 135 at 3yrs and 141 at 5yrs (mean increase in SBP: 15.7, p < 0.001). 74% of patients experienced and increase in SBP ≥10. New HTN on ibrutinib was not associated with: tobacco use, obesity, chronic kidney disease or obstructive sleep apnea (p > 0.05). Conclusions: In this study we demonstrated a high rate of new HTN in patients on prolonged ibrutinib treatment. HTN in these patients is persistent, linear and independent of other risk factors. The increase in BP remained despite initiation of anti-HTN therapy. Additional studies are ongoing to define cardiovascular and renal complications associated with HTN in these patients.