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采用放射免疫法和荧光法对３２例病毒性心肌炎患儿分别于急性期（３２例）、恢复期（２６例）测定血浆超氧化物岐化酶（ＳＯＤ）及脂质过氧化物（ＬＰＯ）含量，并与３４例健康儿童作对照。结果：患儿组急性期ＳＯＤ下降，ＬＰＯ升高，恢复期ＳＯＤ明显上升，但ＬＰＯ仍然高于对照组。提示氧自由基参与心肌炎的病理过程，急性期机体清除自由基的能力下降，恢复期逐渐恢复，但氧自由基的危害依然存在，认为对心肌炎病儿使用抗氧化剂的期限应延长至恢复期。
The plasma levels of superoxide dismutase (SOD) and lipid peroxides (LPO) in 32 children with viral myocarditis were determined by radioimmunoassay and fluorescence spectrometry in acute phase (32 cases) and convalescence (26 cases) Content, and with 34 healthy children as a control. Results: In the acute stage, the level of SOD was decreased, the LPO was increased and the level of SOD was significantly increased in the recovery group, but the LPO was still higher than that of the control group. It is suggested that oxygen free radicals are involved in the pathological process of myocarditis. The ability of the body to scavenge free radicals in the acute phase is declining and the convalescent phase is recovered gradually. However, the damage of oxygen free radicals still exists, and the duration of using antioxidants in children with myocarditis should be prolonged to convalescence.