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本工作用单个期外刺激诱发短阵室颤的方法,观察了30只家免在位心脏急性心肌缺血及再灌注时VP的变化及硫酸镁对VP变化的影响。 实验分对照组(n=15),观察单纯缺血及再灌注时VP的变化;补镁组(n=15),于缺血前静滴等渗硫酸镁100mg/kg,然后改用维持量。使实验过程中动脉血压维持在80mmHg以上。 结果表明:1.缺血前用单个期外刺激不能诱发室颤,因而测不出VP。而缺血早期VP则明显延长,
This work with a single extra-term stimulation induced shortness of ventricular fibrillation method to observe the changes in the 30 cases of brachial myocardium during acute myocardial ischemia and reperfusion VP and magnesium sulfate on VP changes. The experiment was divided into control group (n = 15), observation of ischemia and reperfusion VP changes; magnesium group (n = 15), intravenous infusion of isotonic magnesium sulfate 100mg / kg, and then use the maintenance dose . During the experiment to maintain arterial blood pressure above 80mmHg. The results showed that: 1. Ischemia can not induce ventricular fibrillation with a single extra-period stimulus, thus failing to detect VP. The early ischemic VP was significantly prolonged,