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Severe hyperkalaemia with normal electrocardiogram.

S Bandyopadhyay1, S Banerjee

  • 1Department of Medicine, Royal Gwent Hospital, Newport, Gwent.

International Journal of Clinical Practice
|October 12, 2001
PubMed
Summary
This summary is machine-generated.

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Persistent high serum potassium levels without EKG or biochemical changes suggest pseudohyperkalemia. This case highlights essential thrombocytosis as a cause, linked to platelet fragility and potassium leakage.

Area of Science:

  • Hematology
  • Clinical Biochemistry

Background:

  • Pseudohyperkalemia, characterized by elevated serum potassium without clinical or electrocardiographic abnormalities, can be mistaken for true hyperkalemia.
  • Thrombocytosis, a condition of elevated platelet counts, is an under-recognized cause of pseudohyperkalemia due to in vitro potassium release.

Observation:

  • A case study of an apparently healthy female presenting with persistent, unexplained hyperkalemia.
  • Initial investigations revealed elevated serum potassium levels, but lacked typical signs of true hyperkalemia such as electrocardiographic changes or significant biochemical alterations.

Findings:

  • The persistent hyperkalemia was attributed to pseudohyperkalemia.
  • Further investigation identified essential thrombocytosis as the underlying cause, stemming from increased platelet fragility and subsequent in vitro potassium leakage.

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Implications:

  • This case underscores the importance of considering pseudohyperkalemia in the differential diagnosis of hyperkalemia, especially in asymptomatic individuals.
  • Recognizing thrombocytosis as a cause of pseudohyperkalemia can prevent unnecessary investigations and treatments for true hyperkalemia, guiding towards appropriate hematological evaluation.