Euvolemic Hyponatremia

Introduction to Euvolemic Hyponatremia

Euvolemic hyponatremia is a metabolic condition in which a patient’s serum sodium levels are low due to a lack of extracellular fluid. This condition is common in the elderly and can be caused by kidney failure, congestive heart failure, medications, or some infections. Symptoms of euvolemic hyponatremia can include confusion, weakness, fatigue, headaches, nausea, seizures, and loss of consciousness.

Left untreated, euvolemic hyponatremia can cause serious complications such as swelling of the brain, coma, and death. It is important to recognize the symptoms of euvolemic hyponatremia and to seek medical care immediately if they occur.

Diagnosing Euvolemic Hyponatremia

Euvolemic hyponatremia can be diagnosed through a variety of tests and exams, such as a physical exam, complete blood count, electrolyte panel, and urinalysis. The doctor may also consider imaging tests to rule out other causes of the patient's symptoms. Once euvolemic hyponatremia is diagnosed, the doctor will evaluate the patient's medical history and consider the cause of the condition in order to develop a treatment plan.

Treatment of Euvolemic Hyponatremia

The treatment of euvolemic hyponatremia depends on the underlying cause and the severity of the symptoms. The primary goal of treatment is to restore the patient’s sodium levels to normal. Treatment options may include:

  • Replacing lost fluids with a saline solution
  • Medications to reduce the amount of fluid in the body
  • Steroids to treat certain autoimmune disorders
  • Diuretics to reduce fluid retention
  • Vasopressin blockers to reduce the production of antidiuretic hormone

In some cases, the underlying condition that caused the euvolemic hyponatremia may have to be addressed as well. For example, if the patient has congestive heart failure, they will need to make lifestyle changes or take medications to manage their condition.


Euvolemic hyponatremia is a serious medical condition that can be life-threatening if left untreated. Recognizing the signs and symptoms of the condition is the key to getting proper treatment. It is important to seek medical care right away if you or someone you know is experiencing symptoms of euvolemic hyponatremia.