Abstract
Medications that affect the renin-angiotensin-aldosterone system (RAAS) form the mainstay of current heart failure (HF) therapy in patients with reduced ejection fraction. Concerns about the risk of hyperkalaemia have created a significant barrier to optimal RAAS inhibitor therapy in patients with HF, however, and many patients are discontinuing or receiving suboptimal doses of these lifesaving therapies. This has serious health and economic implications due to adverse renal and cardiovascular events. There is therefore an important unmet need for novel therapeutic options for the long-term management of patients with, and at risk for, hyperkalaemia. Two new potassium-binding agents, patiromer and ZS-9, have been shown to be effective and safe for the treatment of hyperkalaemia, as well as the maintenance of normokalaemia, without dose reduction or discontinuation of RAAS inhibitors. In addition, the fast onset of ZS-9 action suggests that it may be useful in the treatment of acute hyperkalaemia. These agents may allow for dose optimisation of RAAS inhibitors for the long-term maintenance and protection of the renal and cardiovascular system.
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