Objective To investigate the relationship between cardiac vagus nerves and changes of connexins(Cx)and intracellular gap junction(GJ)distribution pattern in superior vena cava(SVC)myosleeve in dog with atrial fibrillation(AF).Methods Twenty four hybrid dogs were divided into sham operation group(Sham group,n=8),SVC-AO fat pad removed group(RM group,n=8)and SVC-AO fat pad reserved group(RS group,n=8).In RM group and RS group,right atrial pacing was performed at a frequency of 500～650/min for 6 weeks to establish AF model.AF was induced by programmed stimulation or burst stimulation of atrial pacing.The expression and distribution of Cx40 and Cx43 in the SVC myosleeve tissue in three groups were analyzed by immunofluorescence staining.Transmission electron microscopy was used to observe the uhrastructural organization of gap junction(GJ).Results The rate of inducing sustained AF(＞ 15 min)in RS group was significantly higher than that in RM group (P ＜ 0.01).The expression of Cx40 and Cx43 in the SVC myosleeve in sham group and RS group were significantly higher than that in RM group(P ＜ 0.05).Furthermore,the expression of Cx40 and Cx43 in RS group were obviously higher than that in sham group(P ＜0.05).The ratio of end-to-end to side-to-side in RS group was lower than that in Sham group and RM group.Comparing with RM group,the channel of GJ became shorter and wider in RS group(P ＜0.05).Sarcomere was dissolved and mitochondrion showed vacuole degeneration in RS group.Conclusion The remodeling of Cx40 and Gx43 in SVC myosleeve tissue may be mediated by vagus nerves.It is conducive to the maintenance and stability of AF.However,this effect can be weakened by removing SVC-AO fat pad of canine.

Objective To observe the efficacy and safety of Shenqiwuweizikeli for treating chronic insomnia.Methods One hundred and ninety-six cases of subjects were randomly divided into Shenqiwuweizikeli group (n =98) and Estazolam tablets group (n =98).The pittsburg sleep quality index (PSQI) was adopted to evaluate the clinical effects and records of adverse reactions during the study period.Also the lab routine inspection(blood routine,urine routine,liver and kidney function, electrocardiogram were conducted to evaluate safety.Results The Shenqiwuweizikeli and Estazolam tablets all had significant effects for chronic insomnia.The total effective rate of Shenqiwuweizikeli group was 92.86％ (91/98), of Estazolam tablets group was 93.88％(92/98) ,and there was no significant difference (P＞0.05).There were no abnormalities in terms of each routine inspection index.After stopping take the medicine, The adverse reactions including bounce sex insomnia(60 cases), daytime sleepiness/drowsiness (55 cases), dizziness with lacking of power and light headedness(23 cases) in Estazolam tablets group were all more than Shenqiwuweizikeli group with significant difference(P＜0.01).Conclusion The Shenqiwuweizikeli has definite efficacy and safety for treated with chronic insomnia without withdrawal of recoil and dependence.