Dyskaliémies:
Hypokalemia (<3.5 meq / l):
* Increased wave U (nonspecific sign)
* Flattening and negativity of the T wave (T + U draws a lying S)
* ST cupuliforme Depression
Hyperkalemia:
* Wave symmetrical and sharp T, narrow base, tent (serum potassium of 5.5 to 6.4 meq)
* The T waves are diffuse and high amplitude; with increasing P and PR and QRS widening moderate (serum potassium levels between 6.5 and 7.4)
* Serum potassium between 6.5 and 8.5 -> conduction disorders dominate:
– Disappearance of P, slow and irregular ventricular rhythm
– Major Widening of QRS (> 0,12s); T wave blunted
– Pseudo-infarct aspects (transient Q waves or eclipses ST segment elevation)
* Serum potassium> 8.5 meq -> excitability disorders dominate: TV; FV
Other:
Dyscalcemia:
Hypocalcemia:
The QT prolongation (by lengthening ST)
Hypercalcemia:
QT shortening
Dysmagnésémie:
Hypomagnesemia is associated hypokalemia and looks as hypermagnesaemia and hyperkalemia
Hypomagnesemia => QT space