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在15只豚鼠心脏上观察了低温处理后引起心室肌细胞早发后去极化(EAD)发生的条件。豚鼠心室肌与猪和大鼠心室肌不同,不能耐受长时间低温(0-4℃)处理。超过10小时低温处理,心室肌细胞在复温后,静息电位保持在—20mv水平,难以恢复正常,对电刺激也不发生反应。本实验观察了经5小时低温后心室肌细胞动作电位的变化。这种标本复温到37℃后,静息电位可以恢复,并在最初0.5—1小时内出现超级化,以后逐渐恢复正常。动
The conditions of premature depolarization (EAD) in ventricular myocytes were observed after cryopreservation in 15 guinea pig hearts. Guinea pig ventricular muscle and pig and rat ventricular muscle different, can not tolerate prolonged hypothermia (0-4 ℃) treatment. More than 10 hours of low temperature treatment, ventricular myocytes in rewarming, the resting potential remained at -20mv level, it is difficult to return to normal, the electrical stimulation does not react. The experiment observed after 5 hours of hypothermia ventricular myocytes changes in action potential. This specimen rewarmed to 37 ℃, resting potential can be restored, and in the first 0.5-1 hours super-appear, and then gradually returned to normal. move