Like hyperkalemic Lab-K+, patients with predicted hyperkalemic ECG-K+ (≥5.5 mmol/L) were more complex, including older age, more co-morbidities (DM, HTN, CKD, and HF) and significantly higher glucose, CRP, pBNP, D-dimer, proteinuria, and lower serum albumin compared with those with normal ECG-K+ (3.6–5.4 mmol/L) or hypokalemia (≤3.5 mmol/L) (Fig. 3). Here, ALB is linked to chronic kidney disease.