This usually requires a potassium level of 6.5 or greater and frequently appears as in "intraventricular conduction delay" or IVCD, which is characterized by a widened QRS complex of > 120 ms that ...

Hyperkalemia causes peaked T waves initially, then an intraventricular conduction delay with a widened QRS complex, then bradycardia. Eventually a “sine wave” pattern ensues. Hyperacute T ...