Physiology Philes: Draw a normal ECG tracing showing the durations of the major intervals and the effects of hyperkalemia. BSCC Examination question
In this video Joel Topf looks at three types of potassium wasting nephropathies: Polyuria; distal RTA; and hypomagnesemia...and how each can lead to hypokalemia.
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.
Potassium is the major intracellular cation (sodium is major extracellular). 90% is exchangeable, with an inverse relationship to serum pH
Hypokalaemia: the most common electrolyte abnormality in hospitalised patients; mostly caused by drugs and GI disease
Hyperkalaemia is a life-threatening emergency. Basic overview of hyperkalemia management