Most abundant cation – Cardiology MCQ – Answer

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Most abundant cation – Cardiology MCQ – Answer

Most abundant cation in the human body – Correct answer:  4. Potassium

Potassium is mostly intracellular, about 98%, with an intracellular concentration of around 140 mEq/l. Extracellular component is only about 2% with serum concentration between 3.8 to 5.0 mEq/l [1].

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  1. João Pedro Ferreira, Javed Butler, Patrick Rossignol, Bertram Pitt, Stefan D Anker, Mikhail Kosiborod, Lars H Lund, George L Bakris, Matthew R Weir, Faiez Zannad. Abnormalities of Potassium in Heart Failure: JACC State-of-the-Art Review. J Am Coll Cardiol. 2020 Jun 9;75(22):2836-2850.