*Hyperkalemia* *Definition* Serum K+ > 5.5 mmol/L *Severity* 1. *Mild*: 5.5–6.0 mmol/L 2. *Moderate*: 6.1–7.0 mmol/L 3. *Severe*: > 7.0 mmol/L *Management Steps* 1. *Stabilize the Heart*: IV calcium gluconate/chloride 2. *Shift K+ into Cells*: 1. Insulin + glucose 2. β2-agonists 3. Sodium bicarbonate 3. *Eliminate K+*: 1. Diuretics 2. Potassium binders (Kayexalate, Patiromer) 3. Dialysis (if critical)