<prompt> Propofol infusion syndrome is characterized byHypokalemiaHypolipidemiaBradycardiaTachycardia  <response>: Propofol infusion syndrome occurs when propofol infusion is continued for more than 48 hoursSevere metabolic acidosisAcute cardiacfailureHyperkalemiaHyperlipidemiaSkeletal myopathyRefractory bradycardia. 