
Episode #5
Hyperkalemia: When Calcium Helps vs Hurts
<p>In this QuikCrit, we break down when calcium actually helps in hyperkalemia, and when it doesn’t.</p><p>Starting with a crashing patient and a wide QRS, we walk through the cardiac action potential, why hyperkalemia slows conduction, and how calcium stabilizes the myocardium without lowering potassium.</p><p>We cover:</p>Why Vₘ follows potassium (Vₘ ≈ Eₖ)How calcium raises threshold potential and restores conductionECG changes in hyperkalemiaCalcium chloride vs gluconateThe role of calcium in PEA arrestWhy giving calcium blindly may not help, and may cause harm<p>Bottom line:</p><p>Calcium isn’t a routine arrest drug...






