Real-World Treatment of Hypertension on Hemodialyses Data from a Large Polish Database.

Abstract

Introduction: The prevalence of hypertension among patients with end-stage kidney disease (ESKD) undergoing hemodialysis (HD) ranges from 72 to 88% depending on applied diagnostic criteria and the chosen method of blood pressure measurement. Despite the guidelines recommending the widespread use of renin-angiotensin system blockers (RASBs) in patients with kidney disease, their utilization in patients on HD may be suboptimal, especially in patients with preserved diuresis. This hesitance that often steams from concern is often due to fear of a decrease in eGFR and a subsequent decrease in diuresis. The aim of this study was to compare clinical characteristics, blood pressure, safety, and HD adequacy indices in hypertensive HD patients on multiple antihypertensive drug regimens, including diuretic treated with RASB (RASB group) or without RASB (no-RASB) with preserved residual diuresis. We sought to examine the real-life use of RASB in HD patients in relation to their clinical characteristics, blood pressure, safety, and HD adequacy.

Methods: From a database of 5,879 patients receiving HD (mean age 65.2 ± 14.2 years, 60% of males) of the largest provider of HD in the country, we selected the subgroup treated with at least three antihypertensive medications including diuretics. We compared patients treated with RASB to counterparts without RASB (no-RASB).

Results: The RASB group has similar age and gender proportions as well as BMI and bioimpedance compared to counterparts. However, dry body mass was significantly lower in the RASB group (78.1 ± 18.3 kg vs. 80.0 ± 18.2 kg, p < 0.017). Prevalence of diabetes mellitus was similar in both groups, but RASB-treated patients have cardiovascular diseases more frequently (70.1 vs. 60.8%; p < 0.001). Systolic blood pressure and the number of antihypertensive drugs used were significantly higher in RASB patients than in counterparts (146 ± 16 mm Hg vs. 144 ± 15 mm Hg; p < 0.001 and 4.1 ± 0.9 vs. 3.5 ± 0.5; p < 0001, respectively). RASB-treated patients have significantly longer dialysis vintage (52.7 ± 44.4 months vs. 40.2 ± 40.9 months; p < 0.001) and dialysis time (722 ± 87.1 min/week vs. 713 ± 93.4 min/week; p < 0.017) than counterparts. Serum potassium was slightly but significantly higher in RASB (5.3 ± 0.8 mmol/L vs. 5.1 ± 0.7 mmol/L; p < 0.01).

Conclusions: In the real world setting, RASB can be safely used in HD patients treated with diuretics with preserved residual diuresis. Given that many HD patients present numerous multimorbidities, RASB should not only be considered as an additional hypotensive drug in poorly controlled hypertension but also in other compelling indications in HD patients. The tendency toward hyperkalemia in HD patients could be effectively managed with appropriate diet and HD prescription adjustments.