Fluids and electrolytes show up on the NCLEX nonstop, and the trick is keeping it simple. Every abnormal sodium level points you toward the brain. Every abnormal potassium level points you toward the heart. If sodium drops too low, you start thinking confusion, seizures, and neuro changes. If potassium shoots up, you think rhythm issues, telemetry, and emergency treatment. Stick to that core idea: sodium is neuro, potassium is cardiac. Once you anchor to that, the questions start feeling a lot l

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