简介:目的比较CT薄层增强扫描与3D-DSA数据源在颅内动静脉畸形(AVM)3D打印数据重组中的效果。方法前瞻性选取5例AVM患者,Spetzler-Martin分级Ⅱ级3例,Ⅲ级2例。对其中2例采用256层螺旋CT薄层增强扫描,3例采用3D-DSA旋转成像,提取检查结果的DICOM原始数据,通过Mimics14.0软件进行数字化处理,并按1∶1比例进行3D打印,获得实体模型并进行效果比较。结果基于256层螺旋CT薄层增强扫描数据源的3D打印可获取颅骨及血管的图像信息,能显示最细直径0.9mm的血管,但AVM内部细支结构难于分辨;基于3D-DSA数据的3D打印,数字减影无颅骨数据信息,但血管分支情况显示更丰富,可显示最细直径0.5mm的血管。结论应用CT薄层增强扫描或3D-DSA数据源均可获得AVM畸形团3D重组图像,而3D-DSA显示AVM畸形团空间构造效果更佳,有助于术前治疗方案的设计及相应辅助工具的开发。
简介:BackgroundThemyocytedysfunctionmaybepresentinaorticstenosis(AS)patientswithpreservedleftventricularejectionfraction(LVEF).Earlyaorticvalvereplacement(AVR)canreversetheLVhypertrophyandimproveLVsystolicperformanceandclinicaloutcome.StrainimaginghasdemonstratedtobethemostappropriatemethodtoevaluateLVmyocardialcontractility.However,4D-strainimagingechocardiographyforthedetectionofsubclinicalleftventriculardysfunctioninASpatientswithpreservedLVEFisseldomstudied.MethodsWeprospectivelyenrolled30consecutivemoderatetosevereASpatientswithpreservedLVEF,and30healthycontrols.Conventionalechocardiographyand4D-strainimagingechocardiographywereundergoneintwogroups.The4Dstrainechocardiographicanalyseswereundertakenbyusing4DAutoLVQsoftware.ResultsComparedwiththehealthycontrols,themoderatetosevereASpatientswithpreservedLVEFhadsignificantlydecreasedglobalradialstrain(GRS),globallongitudinalstrain(GLS),globalareastrain(GAS)and4Dstrain(P<0.05),hadsignificantlyincreasedleftventricularend-diastolicvolumeindex(LVEDVI)andleftventricularmassindex(LVMI)(P<0.05),andhadlowerglobalcircumferentialstrain(GCS)(P>0.05).ConclusionsImpairedLVmyocardialcontractilityexistsinmoderatetosevereASpatients,althoughLVEFispreserved.4D-strainimagingechocardiographycandetectearlyleftventriculardysfunctioninASpatientswithpreservedLVEF.
简介:目的分析心源性脑梗死患者血浆D-二聚体水平的表达情况.方法回顾性连续纳入2013年1月至2016年7月马鞍山中心医院收治的心房颤动致脑梗死患者136例,均在入院次日清晨检测静脉血浆D-二聚体水平.依据出院时情况,分为死亡组(21例)和生存组(115例).记录两组患者性别、年龄、合并疾病、美国国立卫生研究院卒中量表(NIHSS)评分、抗凝治疗情况、脑梗死体积、并发症、血脂、同型半胱氨酸、血浆D-二聚体水平并进行比较.采用受试者工作特征(ROC)曲线判断住院死亡患者的血浆D-二聚体的临床截点.结果死亡组与生存组比较,中枢性高热[28.6%(6例)比8.7%(10例)]、NIHSS评分[(19±3)比(12±3)]、入院昏迷[66.7%(14例)比15.7%(18例)]、C反应蛋白[13.5(9.1,50.6)比2.3(0.0,15.1)mg/L],差异均有统计学意义(均P<0.05).死亡组的血浆D-二聚体水平显著高于生存组[2.9(0.9,4.0)比0.6(0.4,0.9)mg/L,P<0.01],血浆D-二聚体判断住院死亡的ROC曲线下面积为0.816(95%CI:0.686~0.946,P<0.01).结论急性心房颤动致脑梗死死亡患者人院时血浆D-二聚体水平显著高于生存者.
简介:T1mappingusingcardiovascularmagneticresonance(CMR)introducesnoveltechniquesformyocardialtissuecharacterizationtodetectandquantifydiseaseprocessesoccurringatthemicroscopiclevel.EventhoughT1mappinghaslimitedspatialresolution,cellularandmolecularchangesoccurringwithineachvoxelcanaffecttheaggregateT1signalrenderingthemquantifiable.TheestimatedT1-basedparametersquantifiedona“map”demonstratethespatiallocalizationofthesechangeswherebyeachpixelexpressesthequantitativevalueofthatparameter.Thisquantificationpermitsdetectionofdiffusediseaseevenifitisnotdirectlyvisible.Ratherthanrelyingonnonspecificfunctionalmeasures,T1mappingfocusesonintrinsicchangesofmyocardialcompositionthatadvancesunderstandingaboutspecificdiseasepathways.Thesechangesinmyocardialtissuecompositioninformdiagnosisandprognosis.T1mappingencompassestwokeyparameters:native(i.e.,precontrast)T1andextracellularvolumefraction(ECV)derivedfromadditionalpostcontrastT1andbloodT1measurements.Theseadvancesintroducenewtoolstodetectfocalanddiffusemyocardialderangementsoccurringincardiacdiseasethatcanbeotherwisedifficulttodetect.T1andECVmappingfosterprecisionmedicineandpersonalizedcare,promisingtoimprovepatientoutcomesthroughtargetedtherapy.CapitalizingontheopportunitiesintroducedbyT1mappingandECVrequiresfurtherinvestigation.
简介:BackgroundCoronarymicroembolization(CME)ischaracterizedbydistalmicrovascularocclusion.However,theinflammatorymechanismsandtherapeutictargetsofCMEarelargelyunknown.MethodsAtotalof11GuangxiBamaminiatureswinesweredividedintotwogroups:sham(n=5)andCME(n=6).MicrosphereswereinjectedintotheleftanteriordescendingarteryoftheCMEgrouptomakeananimalmodelofCME.TheexpressionsofmicroRNA-146a(miR-146a)andIRAK1,TRAF6,andAUF1inthemyocardiumweredetectedbyqPCR.ResultsIntheCMEgroup,microspheres,microinfarction,andinflammatorycellinfiltrationwerefoundunderanopticalmicroscope.TheexpressionlevelsofmiR-146awerelowinbothgroups.AfterCME,theexpressionlevelsofIRAK1,TRAF6,andAUF1intheCMEgroupwereupregulatedcomparedwiththoseintheshamgroup(P<0.01;P<0.05;P<0.05,respectively).ConclusionsAUF1,IRAK1andTRAF6,butnotmiR-146a,couldbeinvolved,inmyocardiuminflammationfollowingCME.
简介:摘要目的探讨运用3D-Viewer撑开系统微创手术治疗腰椎管狭窄症的临床效果。方法对100例腰椎管狭窄症患者采用3D-Viewer撑开系统建立工作通道经多裂肌间隙行腰椎管狭窄扩大减压。结果本组100例,每个椎间隙的手术时间约45~100min,中位数65min,术中出血50~200ml,中位数100ml,无一例患者出现死亡或神经根损伤、椎间隙感染等严重并发症。结论运用3D-Viewer撑开系统微创手术具有创伤小、出血量少、在直视下操作,手术视野清楚的优势,是微创治疗腰椎管狭窄症一种新的安全、可靠的方法。
简介:摘要目的中老年高血压患者7d家庭自测收缩血压波动性与颈动脉粥样硬化的相关性研究。方法选择100例中老年原发性高血压患者为研究对象。应用彩色多普勒超声仪测量所有患者颈动脉内-中膜厚度(IMT),并根据检查结果分为颈动脉硬化组(n=45)和非硬化组(n=55);同时对所有患者行7d家庭自测血压监测。以7d家庭自测血压读数的标准差(SD)代表BPV值。根据7d家庭自测血压变异性(用标准差表示)的二分位法,将颈动脉粥样硬化组患者分为高变异组和低变异组2组。结果高BPV组的颈动脉斑块检出率(30.0%)明显高于低BPV组(16.0%)。多元线性回归分析结果显示,7dSCV与颈动脉IMT独立相关(P<0.05)。结论7d家庭自测血压患者BPV升高与颈动脉粥样硬化有明显相关性,BPV是颈动脉粥样硬化的重要影响因素。
简介:BackgroundTreatmentofratswiththebeta-adrenergicagonistIsoprenaline(ISO)resultsincardiachypertrophyandmyocardialfibrosis.Inthepresentwork,weaimedtostudytheinvivoeffectsofISOonserumlevelsofmonocytechemoattractantprotein-1andtissueinhibitorofmatrixmetalloproteinasestypeIinWistarrats.MethodsISO(5mg·kg-1)orSalinewereinjectedsubcutaneouslyintoWistarratsonceadayfor3or7consecutivedays.Ventricularremodelingandcardiacfunctionwereevaluatedbyechocardiography.Sectionsofheartwerestainedwithhematoxylin-eosin(HE)forhistopathologyorwithMassonstrichromeforcollagenvisualization.Inaddition,hearttissueimmunohistochemistryforɑ-SMAwasalsoanalyzed.TheserumlevelsoftissueinhibitorofmatrixmetalloproteinasestypeI(TIMP-1)andmonocytechemoattractantprotein-1(MCP-1)weredeterminedbyLuminexmultiplextechnology.ResultsISOinducedcardiacdysfunctioninratsafter3or7daysoftreatment.ISOcausedsignificantincreaseofmyocardialdisorderandfibrosiswithincreasedɑ-SMAexpression.ISOtreatedaatsshowedasignificantincreaseintheserumlevelsofTIMP-1andMCP-1.ConclusionsOurstudysuggeststhatISOinducesprofoundcardiacremodelingaccompaniedwithincreaseofserumTIMP-1andMCP-1.