Sacubitril-valsartan as a treatment for apparent resistant hypertension in patients with heart failure and preserved ejection fraction

Aims: Patients with heart failure and preserved ejection fraction (HFpEF) frequently have difficult-to-control hypertension. We examined the effect of neprilysin inhibition on 'apparent resistant hypertension' in patients with HFpEF in the PARAGON-HF trial, which compared the effect of sacubitril-valsartan with valsartan. Methods and results: In this post hoc analysis, patients were categorized according to systolic blood pressure at the end of the valsartan run-in (n = 4795). 'Apparent resistant hypertension' was defined as systolic blood pressure ≥140 mmHg (≥135 mmHg if diabetes) despite treatment with valsartan, a calcium channel blocker, and a diuretic. 'Apparent mineralocorticoid receptor antagonist (MRA)-resistant' hypertension was defined as systolic blood pressure ≥140 mmHg (≥135 mmHg if diabetes) despite the above treatments and an MRA. The primary outcome in the PARAGON-HF trial was a composite of total hospitalizations for heart failure and death from cardiovascular causes. We examined clinical endpoints and the safety of sacubitril-valsartan according to the hypertension category. We also examined reductions in blood pressure from the end of valsartan run-in to Weeks 4 and 16 after randomization. Overall, 731 patients (15.2%) had apparent resistant hypertension and 135 (2.8%) had apparent MRA-resistant hypertension. The rate of the primary outcome was higher in patients with apparent resistant hypertension [17.3; 95% confidence interval (CI) 15.6-19.1 per 100 person-years] compared to those with a controlled systolic blood pressure (13.4; 12.7-14.3 per 100 person-years), with an adjusted rate ratio of 1.28 (95% CI 1.05-1.57). The reduction in systolic blood pressure at Weeks 4 and 16, respectively, was greater with sacubitril-valsartan vs. valsartan in patients with apparent resistant hypertension [-4.8 (-7.0 to -2.5) and 3.9 (-6.6 to -1.3) mmHg] and apparent MRA-resistant hypertension [-8.8 (-14.0 to -3.5) and -6.3 (-12.5 to -0.1) mmHg]. The proportion