Sine-wave pattern on the electrocardiogram and hyperkalaemia

Hyperkalaemia is an electrolyte disturbance that can have effects on myocardial conduction causing electrocardiographic changes. Several factors may predispose to and promote potassium serum level increase leading to typical electrocardiographic abnormalities. We describe the case of a patient who presented with hyperkalaemia and an electrocardiographic aspect consistent with a sine-wave pattern.