
1) Electrolyte disturbance 2) Symptom
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https://www.crosswordclues.com/clue/hyponatremia

Hyponatremia (American English) or hyponatraemia (British English) is defined as a low sodium concentration in the blood. In most cases, it is caused by drinking too much water, resulting in an electrolyte disturbance in which the sodium ion concentration in the blood plasma is lower than normal. Too little sodium in the diet alone is very rarely ...
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http://en.wikipedia.org/wiki/Hyponatremia

Abnormally low sodium
concentration in the blood.
Found on
http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryh.html

(from the article `nutritional disease`) ...thus sodium deficiency is rare, even for those on low-sodium diets. Sodium depletion may occur during prolonged heavy sweating, vomiting, or ...
Found on
http://www.britannica.com/eb/a-z/h/92

Lower-than-normal amount of sodium in the blood.
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http://www.cancer.gov/dictionary?expand=H

Low levels of sodium in the blood.
Found on
http://www.cat-world.com.au/glossary

(hi″po-nә-tre´me-ә) deficiency of sodium in the blood. It can occur as a result of inadequate sodium intake, as in a sodium-restricted diet, excessive water ingestion or retention, or excessive salt wasting. Symptoms include muscular weakness and twitching, progressing to convulsions if unrelieved; alt...
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http://www.encyclo.co.uk/local/21001

Type: Term Pronunciation: hī′pō-nă-trē′mē-ă Definitions: 1. Abnormally low concentrations of sodium ions in circulating blood.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=42941

Hyponatremia: An abnormally low concentration of sodium in the blood. Too little sodium can cause cells to malfunction, and extremely low sodium can be fatal. Hyponatremia has many causes including medications such as diuretics and antidepressants, hypothyroidism, cortisone deficiency (such as in Addison's disease), dehydration, vomiting or diarrhe...
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http://www.medterms.com/script/main/art.asp?articlekey=3859

Abnormally low levels of sodium in the blood.
Found on
http://www.thehorse.com/Glossary.xhtml?L=H

[
n] - abnormally low level of sodium in the blood
Found on
http://www.webdictionary.co.uk/definition.php?query=hyponatremia

Low blood sodium. The most common cause is Addison's disease or iatrogenic from the administration of electrolyte free solution, such as 5% dextrose.
Found on
https://www.encyclo.co.uk/local/22445
No exact match found.