ESKD: end-stage kidney disease; ACE: angiotensin-converting enzyme; CKD: chronic kidney disease; RAS: renin-angiotensin system; NSAIDs: nonsteroidal antiinflammatory drugs; IV: intravenous; ECG: electrocardiogram. * Cardiac manifestations of hyperkalemia are discussed in detail in the topic on clinical manifestations of hyperkalemia. ¶ Some experts given IV calcium only to patients with ECG changes. Details are presented in the topic on treatment of hyperkalemia.