Open heart surgery was performed with beating heart in order to reduce damage to the heart due to hyperthermia cardiac arrest. Under mild hyperthermia (31～34℃), CPB with slow cardiac rhythm, apnea, head-position, maintenance of MAP>8kPa, 113 cases of type ASD and VSD with diameter from 0.5 to 2.0 cm were operated upon with open heart technic from June 1995 to June 1999. There was no mortality, no air embolism, except in 4 cases operation was only completed under moderate hyperthermia and cardiac arrest instead due to poor vision of the operating field. 12 cases were complicated by slight hemoglubinuria after 24h of operation, and 1 case by remnant VSD. 95 cases were followed-up, and they were in healthy condition. This operative technic is suitable for the repair of secondary ASD, and small or moderate, membranous or para-membranous VSD. Its advantage is less myocardial damage, and shorten the duration of cardiac arrest. Air embolism is likely to take place by using this method, but effective method should be taken to prevent it.%探讨在心脏跳动下施行心内直视手术，以减少因低温心脏停跳造成的心肌损伤。采用全身浅低温（31～34℃），CPB，心脏缓慢跳动（50～60次／分），头低位，停止呼吸，保持MAP＞8kPa（60mmHg）的方法，自1995年6月～1999年6月，施行继发孔ASD和直径在0.5～2.0cm的VSD手术113例。4例VSD因术野显露不良无法完善修复，术中改中低温心脏停跳下完成手术。术后24h内轻度血红蛋白尿12例。残余VSD 1例。全组无气栓发生，无手术死亡。随访95例身体恢复健康。此法较低温心脏停跳法心肌损伤小，减少了低温心脏停跳过程，较适合于继发孔ASD和膜部、膜周部中、小VSD的修复。与心脏停跳下手术相比易发生气栓，但是可采取有效措施预防。
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