MCQs on Serum Electrolytes 4.8 (4569)

Which electrolyte imbalance is most commonly associated with cardiac arrhythmias?• A) Hypernatremia• B) Hypokalemia• C) Hypercalcemia• D) HypomagnesemiaAnswer: B) HypokalemiaExplanation: Hypokalemia lowers resting membrane potential, increasing myocardial excitability, which can trigger arrhythmias. Causes include diuretics,…