We report a case of overdrinking-induced hyponatraemia from the 2007 London Marathon. The patient was a 37-year-old experienced female marathon runner. She was brought to the emergency room more than 6 h after completing the marathon suffering from diarrhoea, vomiting and confusion, and was unable to recall any detail of the race. An arterial blood sample confirmed hyponatraemia ([Na+] 117 mmol.l−1) associated with hypokalaemia (serum potassium concentration 3.4 mmol.l−1) and respiratory alkalosis (pH 7.62, bicarbonate 16.1 mmol.l−1 and Pco2 2.14 kPa). A diagnosis of uncomplicated exercise-associated hyponatraemia due to voluntary overdrinking was made and the patient was catherised and treated with a slow (1 h) intra-venous infusion of 500 ml of 1.8% sodium chloride (NaCl) solution. The following morning her serum [Na+] had normalised at 135 mmol.l−1 and she was discharged in the afternoon. She has recovered fully without sequelae.
Statistics from Altmetric.com
Competing interests: none.
Patient consent: Patient/guardian consent was obtained for publication.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.