差异性传导对房室及房室结折返性心动过速心内电图的影响

目的 分析差异性传导对室上性心动过速心内电图产生影响的机制 ,探讨解决问题的方法。方法 选择室上性心动过速病人 35 7例 ,其中房室折返性心动过速出现差异性传导 2 6 / 187例 ,房室结折返性心动过速出现差异性传导 6 / 170例 ,观察出现差异性传导时心内电图的影响。结果 房室结折返性心动过速出现差异性传导时 ,心动过速的频率和心内电图无改变。右侧旁道介导的房室折返性心动过速出现右束支差传时心内电图类似于慢 -快型房室结折返性心动过速 ,同时伴心率下降。出现左束支差传时 ,心内电图类似于慢 -慢型房室结折返性心动过速或房速 ,心率不变。左侧旁道介导的房室折返性心动过速出现差传时 ,心内激动顺序不变 ,出现左束支差传时心率下降 ,右束支差传时心率不变。结论 差异性传导对房室结折返性心动过速及左侧旁道介导的房室折返性心动过速心内电图无影响。但对右侧旁道介导的房室折返性心动过速心内电图有较大的影响。旁道的电生理特性结合电生理检查有助于鉴别诊断。

Genetic Differences between Wild and Captive Populations of the Peregrine Falcon （Falco peregrinus） and the Saker Falcon （Falco cherrug） Living in the Czech Republic

The microsatellite analysis of DNA plays an important role in studying the population genetics such as population structure, genetic variability and diversity, phylogenetic relationships of wild population of endangered species. The main aim of this study was the estimation of ten microsatellite markers variability in the F. cherrug and F. peregrinus populations. We investigated genetic diversity and structure of populations by using non-invasive genetic identification of individuals to characterize populations of raptors living in the captivity and wild in the Czech Republic during the breeding seasons 2009 and 2010. Within Falco cherrug, significant moderate genetic differentiation （FsT） was observed between Falco cherrug wild and captive. This means that there could be a little differentiation between the wild and the captive populations caused by Falco cherrug subspecies origin or hybridization in the captivity. The absence of significant genetic differentiation between Falco peregrinus wild and captive may be caused by the influence of reintroduction the captive populations in the past. Whereas one breeding population ofFalco peregrinus （Kokorinsko2 2010） was clustered by UPGMA dendrogram into the individual group, we assumed this population like independent, maybe not influenced by other groups. Moreover, a larger sample size would be necessary to confirm the hypothesis.