Hyperkalaemia is probably the most feared electrolyte disturbance, as the first symptom can be sudden death (VF arrest). There are always going to be cases where we are presented with the ECG before the blood results are available (the gas machine is broken, the patient couldn't be bled at triage, etc). Wouldn't it be great if we could gauge the patient's risk of short-term adverse events based on their ECG?

Western Journal of Emergency Medicine, August 2017