Assertion: hyperkalemia | /r/HasAspect | obvious symptoms
Facets:
value: often
type: TEMPORAL
value: in the early stage
type: TEMPORAL
Source sentences:
text: Since hyperkalemia often has no obvious symptoms in the early stage, it can cause sudden stopping of heart beat, therefore it is very important for kidney failure patients to have close monitoring of their serum potassium level as well as other electrolytes and seek timely and proper measure when potassium is high.