PubMed:26459796 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/26459796","sourcedb":"PubMed","sourceid":"26459796","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/26459796","text":"Effect of patiromer on reducing serum potassium and preventing recurrent hyperkalaemia in patients with heart failure and chronic kidney disease on RAAS inhibitors.\nAIMS: We evaluated the effects of patiromer, a potassium (K(+) )-binding polymer, in a pre-specified analysis of hyperkalaemic patients with heart failure (HF) in the OPAL-HK trial.\nMETHODS AND RESULTS: Chronic kidney disease (CKD) patients on renin-angiotensin-aldosterone system inhibitors (RAASi) with serum K(+) levels ≥5.1 mEq/L to \u003c6.5 mEq/L (n = 243) received patiromer (4.2 g or 8.4 g BID initially) for 4 weeks (initial treatment phase); the primary efficacy endpoint was mean change in serum K(+) from baseline to week 4. Eligible patients (those with baseline K(+) ≥5.5 mEq/L to \u003c6.5 mEq/L and levels ≥3.8 mEq/L to \u003c5.1 mEq/L at the end of week 4) entered an 8-week randomized withdrawal phase and were randomly assigned to continue patiromer or switch to placebo; the primary efficacy endpoint was the between-group difference in median change in the serum K(+) over the first 4 weeks of that phase. One hundred and two patients (42%) had heart failure (HF). The mean [± standard error (SE)] change in serum K(+) from baseline to week 4 was -1.06 ± 0.05 mEq/L [95% confidence interval (CI), -1.16,-0.95; P \u003c 0.001]; 76% (95% CI, 69,84) achieved serum K(+) , 3.8 mEq/L to \u003c5.1 mEq/L. In the randomized withdrawal phase, the median increase in serum K(+) from baseline of that phase was greater with placebo (n = 22) than patiromer (n = 27) (P \u003c 0.001); recurrent hyperkalaemia (serum K(+) , ≥5.5 mEq/L) occurred in 52% on placebo and 8% on patiromer (P \u003c 0.001). Mild-to-moderate constipation was the most common adverse event (11%); hypokalaemia occurred in 3%.\nCONCLUSION: In patients with CKD and HF who were hyperkalaemic on RAASi, patiromer was well tolerated, decreased serum K(+) , and, compared with placebo, reduced recurrent 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