“…Indeed, the clinical consequences of hyperkalemia can range from mild elevations with no electrocardiographic changes to more pronounced elevations that can lead to ventricular fibrillation or asystole, cardiac arrest, or death. 20,37,38 Most descriptions of hyperkalemia after an RBC transfusion are at the level of case reports 39,40 or small non-experimental studies of trauma 17,18,41 and cardiology patients. 19,[42][43][44] Ours is the first study to investigate the association between RBC transfusion and hyperkalemia in a large population of patients with advanced CKD, using a design well-suited for assessing safety.…”