Hew-Butler T et al. - Exercise-associated hyponatremia (EAH) is a potentially fatal fluid imbalance largely resulting from sustained fluid intake beyond the capacity for fluid excretion during endurance exercise. The prompt administration of an intravenous (IV) bolus of hypertonic saline in the field or hospital setting can be lifesaving once EAH is documented. Conversely, oral sodium supplementation will not prevent the development of EAH encephalopathy if exuberant fluid intake combined with non-osmotic secretion of AVP occurs during prolonged physical activity.
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