ECG findings in hyperkalemia. ECG findings are frequently used to guide the diagnosis ... widening of the QRS complex, sine-like wave ECG pattern, and asystole, should be treated with potassium ...

Absence of the P waves and eventually a “ sine wave ... The ECG findings of hyperkalemia change as the potassium level increases, from slightly high levels to very high levels.

A pair of studies shared by AliveCor — which makes the KardiaBand EKG band for the Apple Watch — suggest that the accessory may be effective at detecting at least two serious health conditions.

The ECG findings of hyperkalemia change as the potassium level increases. ... Absence of the P waves and, eventually, a "sine wave" pattern (see below), which is frequently a fatal rhythm.