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Hyponatremia or hyponatraemia is a low concentration of sodium in the blood. [4] It is generally defined as a sodium concentration of less than 135 mmol/L (135 mEq/L), with severe hyponatremia being below 120 mEq/L. [3] [8] Symptoms can be absent, mild or severe.
But if symptoms do develop from hyponatremia, they are typically non-specific such as nausea/vomiting, headache, fatigue and muscle cramps/weakness. More severe hyponatremia (levels less than 120 ...
In severe or acute hypoosmolar hyponatremia, swelling of brain cells causes various neurological abnormalities, which in severe or acute cases can result in convulsions, coma, and death. The symptoms of chronic syndrome of inappropriate antidiuresis are more vague, and may include cognitive impairment, gait abnormalities, or osteoporosis. [2]
Severity of symptoms is directly correlated with severity of hyponatremia and rapidness of onset. [3] General symptoms include loss of appetite, nausea, vomiting, confusion, agitation, and weakness. [14] [3] More concerning symptoms involve the central nervous system and include seizures, coma, and death due to brain herniation.
Hypoaldosteronism causes low sodium (hyponatremia), high potassium (hyperkalemia), and metabolic acidosis, a condition in which the body produces excess acid.These conditions are responsible for the symptoms of hypoaldosteronism, which include muscle weakness, nausea, palpitations, irregular heartbeat, and abnormal blood pressure.
Symptoms of hypovolemic shock can be related to volume depletion, ... SI≥0.6 is a clinical shock. ... Hypernatremia or hyponatremia can result, ...
The low GFR causes a lowered rate of osmole excretion, and an increase in the amount of water reabsorbed; thus, hyponatremia occurs when the amount of water intake exceeds the renal water excretion capacity. [2] Medications, such as thiazides and antidepressants, may exacerbate symptoms of hyponatremia. [2]
In the ensuing years, however, hyponatremia in cerebral pathology was described without clinical or laboratory evidence of dehydration. Renal and adrenal function appeared intact, but, unlike in the earlier case of "cerebral salt wasting" described by Cort, an increase in renal absorption and plasma concentration of sodium occurred with ...