<prompt> True about hyperkalemia -Stop hea in systoleInsulin-Glucose is givenECG is diagnosticSerum potassium more than 5.2 mmolL  <response>: Classically, the electrocardiographic manifestations in hyperkalemia progress from tall peaked T waves 5.5-6.5 mM, to a loss of P waves 6.5-7.5 mM to a widened QRS complex 7.0-8.0 mM, and, ultimately, a to a sine wave pattern 8.0 mM. However, these changes are notoriously insensitive, paicularly in patients with chronic kidney disease or end-stage renal disease. ref: harrisons principles of internal medicine, 19E page 310 