本文报道了５３例深低温暂停循环手术患儿术后１４月～４年９月智能测试的结果，平均智商（ＩＱ）为８８．６±１６．１，其中智能低下有７名，占１３．２％，高于正常儿童的发生率，可能与患儿术前智能发育障碍有关。按停循环时间６０分钟以上、４１～６０分钟和４０分钟以下分组，ＩＱ分别为８４．８±１１．９、８６．２±１５．７和９５．５±１９．２，智能低下发生率分别为１１．１％、１５．６％和８．５％，均无显著差异，停循环时间与ＩＱ的直线相关分析提示无明显相关性。 This paper reports the results of intelligent tests performed in 53 children with hypothermic pause circulatory surgery from 14 months to 4 years after September, with mean IQ (IQ) of 88.6 ± 16.1, of which 7 were mental retardation, accounting for 13%. 2%, higher than the incidence of normal children may be related to preoperative mental retardation in children. According to the circulatory arrest time of more than 60 minutes, 41 to 60 minutes and less than 40 minutes, the IQs were 84.8 ± 11.9, 86.2 ± 15.7 and 95.5 ± 19.2, respectively, and the rates of mental retardation were 11.1%, 15.6% and 8.5% respectively. There was no significant difference between the two groups in the linear correlation of circulatory arrest time and IQ.