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What is a 24-hour urinary excretion of aldosterone test?

In the 24-hour urinary excretion of aldosterone test, a patient eats a high-salt diet for 5 days before measuring the amount of aldosterone in the urine over a 24-hour period. In patients with primary hyperaldosteronism, aldosterone will not be suppressed by the salt load, and the level of aldosterone in the urine will be high.

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