Exercise-associated Hyponatremia Developing Immediately after a Musical Stage Performance in a Healthy Actress

Area of Science:

• Sports Medicine
• Endocrinology
• Emergency Medicine

Background:

• Exercise-associated hyponatremia (EAH) is a serious condition often seen in endurance athletes.
• It results from dilutional hyponatremia caused by excessive fluid intake relative to electrolyte loss.
• While common in athletes, EAH can occur in other physically active individuals.

Purpose of the Study:

• To report a case of EAH in a non-athlete.
• To highlight the risks of excessive fluid intake during prolonged physical exertion.
• To emphasize the importance of recognizing and managing EAH in diverse populations.

Main Methods:

• Case report of a 49-year-old actress presenting with symptoms after a 2-hour performance.
• Clinical assessment including serum sodium and arginine vasopressin levels.
• Treatment with intravenous 3% saline.

Main Results:

• The patient presented with severe dilutional hyponatremia (117 mmol/L) and elevated arginine vasopressin (11.3 pg/mL).
• Rapid improvement in sodium levels and consciousness after 3% saline infusion.
• No signs of osmotic demyelination syndrome post-treatment.

Conclusions:

• Excessive fluid intake during or after physical activity poses a risk for EAH, irrespective of athletic status.
• Prompt diagnosis and treatment with hypertonic saline are crucial for recovery.
• Awareness and caution regarding fluid intake are essential for all physically active individuals to prevent EAH.