本文阐述用整体家兔所做的烟酰胺(即维生素PP)对抗硫酸镁所引起的缓慢型心律失常,主要观察了窦性心律和P—R间期的变化。硫酸镁对心律和心电图的影响比较明显,可使心率减慢,P—R间期延长,烟酰胺能显著的改变硫酸镁这两方面的作用,使心率增快,P—R间期缩短。 实验方法与材料 给药组:选体重在2～3kg,雌雄各半的家兔,用20％乌拉坦溶液5ml/kg麻醉,然后用5％ This article describes the slow arrhythmia caused by nicotinic acid amide (ie, vitamin PP) made by whole rabbits against magnesium sulfate and mainly observes changes in sinus rhythm and P-R interval. Magnesium sulfate on cardiac rhythm and electrocardiogram more obvious impact, can slow down the heart rate, prolonged P-R, nicotinamide can significantly change the role of magnesium sulfate, the heart rate increased, P-R interval shortened. Experimental methods and materials Administration group: Select the weight of 2 ~ 3kg, male and female rabbits, with 20% urethane solution 5ml / kg anesthesia, and then with 5%