When serum potassium exceeds 6.5 mmol/L, or when hyperkalemia is symptomatic with ECG abnormalities or muscular weakness, immediate structured management is required. The following overview describes the clinical scenario and the goals of care; the full regimen is available via the link below.

Clinical scenario

Serum potassium above 6.5 mmol/L (severe), or symptomatic hyperkalemia presenting with muscular weakness and/or ECG changes — including peaked T waves.

Why this presentation requires urgent action

Severe hyperkalemia — with serum potassium above 6.5 mmol/L — or symptomatic disease with ECG changes represents a clinically urgent situation. Peaked T waves and muscular weakness are recognised indicators of significant potassium elevation with potential cardiac involvement.

Approach overview

Management begins with continuous cardiac monitoring. When ECG abnormalities are present, a specific cardiac-protective intervention is initiated. The primary clinical goal is:

ECG normalisation within 10 minutes

The complete step-by-step regimen — including choice of agents, administration, and repeat criteria — is available in the full structured protocol below.

References

HYPERkalaemia (Mild: 5.2–5.9 mmol/L, Moderate: 6.0–6.5 mmol/L, Severe: more than 6.5 mmol/L)
Severe or symptomatic hyperkalaemia (e.g. muscular weakness and/or ECG changes [e.g. peaked T waves])
Institute continuous ECG monitoring.
If ECG abnormalities are present – calcium gluconate one ampoule (2.2 mmol of calcium) IV via a central vein or slowly over 2 to 3 minutes into a large vein.
If ECG does not normalise within 10 minutes, dose may be repeated (to a total of 0.1 mmol/kg).

View source ↗

Treatment of Severe Hyperkalemia with Serum Potassium Above 6.5 mmol/L or ECG Changes

Why this presentation requires urgent action

Approach overview

References