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Updated: Aug 18, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
Published on: April 5, 2011
Severe hyperkalaemia with normal electrocardiogram
1Department of Medicine, Royal Gwent Hospital, Newport, Gwent.
Elevated serum potassium without associated electrocardiograph and biochemical changes makes the diagnosis of pseudohyperkalaemia likely. One of the common causes of this is thrombocytosis with in vitro leak of cellular potassium due to increased fragility of the platelets. We report a case where the diagnosis of essential thrombocytosis was made during investigation of persistent hyperkalaemia in an apparently healthy female.
Elevated serum potassium without associated electrocardiograph and biochemical changes makes the diagnosis of pseudohyperkalaemia likely. One of the common causes of this is thrombocytosis with in vitro leak of cellular potassium due to increased fragility of the platelets. We report a case where the diagnosis of essential thrombocytosis was made during investigation of persistent hyperkalaemia in an apparently healthy female.
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