简介：正常成年人12导联心电图的V1导联呈rS型。当V1导联以R波为主或R/S〉1时,临床可见于完全性右束支阻滞、后壁心肌梗死、右心室肥大、肥厚型心肌病、右位心、A型心室预激及正常变异等多种情况。本文结合心电图与心电向量图,对V1导联R/S〉1的几种表现进行分析总结。

简介：QT离散度（QTd）和T波峰末间期（TpTe）异常增大，标志心室肌复极化的离散，与室性心动过速发生密切相关。室性期前收缩Lown’s分级是临床用于评价室性心律失常预后的方法，Lown’s3—5级患者易发生恶性室性心律失常而猝死。本文目的旨在观察冠心病室性期前收缩Lown’s分级和QTd和TpTe，探讨这些指标对冠心病发生恶性室性心律失常的预测价值。

简介：BackgroundRightbundlebranchblock(RBBB)maypresentasslurredornotchedSwaveinleadV1.However,slurredornotchedSwavemayalsorepresentslowconductioninthemyocardium.MethodsWeretrospectivelyanalyzedtheQRSpatternsinleadsV3RtoV5Rin7patientswithaslurredornotchedSwaveinleadV1.ResultsIntheleadsV3RtoV5R,6patientsshowedincompleteorcompleteRBBBand1patientslurredornotchedSwave.ConclusionsInthemajorityofECGsinasmallpatientserieswithslurredornotchedSwaveinleadV1,QRSmorphologyindicatingincompleteorcompleteRBBBwaspresentinleadsV3RtoV5R.AfindingoffragmentedQRSintheseleadsmayindicateslowconductioninthemyocardium.

简介：背景新生内膜形成是动脉粥样硬化、再狭窄等血管病理改变时的重要特征。阿托伐他汀能否通过抑制组织蛋白酶S(CatS)及核转录因子κB(NF-κB)表达减轻新生内膜形成目前尚不清楚。目的观察阿托伐他汀对大鼠颈动脉球囊损伤后CatS及NF-κB表达的影响。方法24只雄性SD大鼠分为正常对照组(n=8)、手术组(n=8)和阿托伐他汀组(n=8),手术组和阿托伐他汀组行左侧颈动脉球囊损伤。阿托伐他汀组予阿托伐他汀10mg/(kg·d)。实验前后测定血清白细胞介素1-β(IL-1β)变化,28d后大鼠处死行病理形态学检查,检测各组CatS和NF-κB表达。结果与手术组比较,阿托伐他汀组大鼠颈动脉内膜面积和内膜/中膜面积(I/M)比值明显减少,差异有统计学意义[内膜面积:(148.6±8.8)×103μm2比(64.8±5.1)×103μm2;I/M:(2.1±0.2)比(0.9±0.1),均P<0.01]。与手术组比较,阿托伐他汀组CatS表达和NF-κB评分也明显减少,差异有统计学意义[CatSmRNA:(0.80±0.07)比(0.50±0.04);CatS评分:(15.3±1.4)比(8.5±0.7);NF-κB评分:(12.5±1.3)比(6.7±0.5),均P<0.01]。内膜面积与CatS和NF-κB表达呈正相关(P<0.05)。结论阿托伐他汀可能通过抑制NF-κB使CatS表达减少,减轻颈动脉球囊损伤后新生内膜形成。

简介：Objectives:Apoptosisisrecognizedasanimportantmechanismincontrast-inducednephropathy(CIN).Cordycepssinensis(CS),atime-honoredtonicfoodandherbalmedicineinChina,canimprovethemicrocirculation,increasethetolerancetoischemiainpatientswithmicrocirculatorydisorders.AsCShasbeenfoundtoberenoprotectiveandanti-apoptoticinmultiplekidneyinjuries,wehypothesizedthatCSwouldpreventCIN.TheobjectiveofthisresearchistostudythemechanismofCSontubularepithelialcellapoptosisindiabeticCINrats.

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