Which of the following is a common cause of hyperkalemia?

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Multiple Choice

Which of the following is a common cause of hyperkalemia?

Potassium balance is controlled mainly by the kidneys, which filter potassium and excrete it into urine, a process boosted by aldosterone. When the kidneys fail, their ability to filter and to secrete potassium into the distal tubule drops, causing potassium to accumulate in the blood and leading to hyperkalemia. That direct link between reduced renal excretion and high serum potassium makes renal failure the most common cause. Dehydration or low blood volume can reduce kidney perfusion and worsen function, but they’re not as directly and reliably linked to sustained hyperkalemia as actual kidney failure. Hypothyroidism isn’t typically associated with elevated potassium levels.

Potassium balance is controlled mainly by the kidneys, which filter potassium and excrete it into urine, a process boosted by aldosterone. When the kidneys fail, their ability to filter and to secrete potassium into the distal tubule drops, causing potassium to accumulate in the blood and leading to hyperkalemia. That direct link between reduced renal excretion and high serum potassium makes renal failure the most common cause.

Dehydration or low blood volume can reduce kidney perfusion and worsen function, but they’re not as directly and reliably linked to sustained hyperkalemia as actual kidney failure. Hypothyroidism isn’t typically associated with elevated potassium levels.

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