Hypernatremia is especially dangerous for children and the elderly
Severe hypernatremia has a mortality rate of 40-60%
Hypernatremia can cause neurological damage due to shrinkage of brain cells
Severe hypernatremia, with serum sodium above 152 mM, can result in seizures and death
Yes
Yes
yes
I think that exertional syncope is a kind of cardiac syncope. During exertion the patient with heart disease would be unable to supply enough oxygen to the brain, causing dizziness.
Yes
Yes
High serum sodium levels
Yes