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Τετάρτη 3 Ιανουαρίου 2018

Cardiac tamponade causing severe reversible hyponatraemia

Severe hyponatraemia in setting of cardiac tamponade is very rare and only few case reports have been reported so far. This case report highlights pericardial tamponade as a rare but easily treatable cause of severe hyponatraemia. Pertinent literature is also reviewed. A 70-year-old woman presented to the emergency department with altered mental status. She was tachycardic and hypotensive with cardiomegaly on a chest X-ray. Serum sodium was severely low at 109 mmol/L and was identified as the likely cause for her abnormal mentation. She was also in acute renal failure with serum creatinine of 4.1 mg/dL. A transthoracic echocardiogram was done that showed a large pericardial effusion with evidence of tamponade physiology. She underwent emergent pericardiocentesis with rapid improvement in clinical picture and blood pressure. Her serum sodium level rapidly improved and was normal in 48 hours.



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