Tag Potassium
BSCC Basic Science in Clinical Context 340 2

ECG waves and hyperkalaemia

Physiology Philes: Draw a normal ECG tracing showing the durations of the major intervals and the effects of hyperkalemia. BSCC Examination question

Potassium toxicity

Potassium clearly has its potential for risks including life-threatening hyperkalaemia and cardiac arrest. It is very concerning that the slow-release preparation is available in bottles of 100 without prescription. Aggressive decontamination and haemodialysis are indicated in large overdoses.
CCC Critical Care compendium 340


Potassium is major intracellular cation (sodium is major extracellular) – 90% is exchangeable (70% for sodium). Equilibrium potential of -90mV
CCC Critical Care compendium 340


Hypokalaemia: the most common electrolyte abnormality in hospitalised patients; mostly caused by drugs and GI disease