Additional IVIG treatment and corticosteroid pulse therapy
IVIG-resistant patientswere randomly divided into two groups by random number table: group A receivedadditional IVIG (2g/kg given as a single intravenousinfusion); group B receivedmethylprednisolone15 mg.kg−1.d−1intravenously for 3 days, without asubsequent course and taper of oral prednisone. Both groups tookaspirin orally (30–50mg.kg−1.d−1).During corticosteroid pulse infusion and IVIG treatment, patients underwentcontinuous cardiac monitoring. Frequentevaluations were made after the infusion untilvital signs were stable.