Hyperkalemia is a common condition in Emergency Departments (EDs) and can be fatal [1–3]. Hyperkalemia reduces conduction velocity and renders myocytes refractory to excitation. Dysrhythmias are possible complications [4,5]. Electrocardiogram (ECG) seem to range from nonspecific repolarization abnormalities (i.e. peaked T-wave) in mild hyperkalemia to sine-wave like patterns (i.e. P-wave flattening, prolonged PR and QRS interval) as well as bundle-branch-block-like QRS morphologies in severe hyperkalemia [5–9].
