Symptoms depend on many things, including: 1  Type and strength of voltage. 2  How long you were in contact with the electricity. 3  How the electricity moved through your body. 4  Your overall health.
Hyponatremia refers to a lower-than-normal level of sodium in the blood. Sodium is essential for many body functions including the maintenance of fluid balance, regulation of blood pressure, and normal function of the nervous system.
Therefore, too much or too little sodium can cause cells to malfunction, and extremes in the blood sodium levels (too much or too little) can be fatal. 1  Increased sodium (hypernatremia) in the blood occurs whenever there is excess sodium in relation to water.