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:目的探讨三维伪连续动脉自旋标记成像(3D-pcASL)与扩散加权成像(DWI)在急性脑梗死疾病中的临床应用价值。方法33例急性脑梗死患者均行常规磁共振平扫、DWI和3D-pcASL序列扫描检查。分别测量ASL灌注异常面积和DWI信号异常面积进行比较分析;测量ASL灌注异常区域与对侧镜像区域的脑血流量(CBF)值,并对低灌注组梗死区CBF值与对侧镜像区进行比较。结果33例急性脑梗死患者中30例ASL显示病灶范围大于DWI,3例ASL显示病灶范围约等于DWI,差异有统计学意义(P〈0.05)。33例病灶中低灌注30例,平均CBF值(25.59±11.54)ml/100g·min,对侧镜像CBF值(39.31±13.12)ml/100g·min,差异有统计学意义(P〈0.05);高灌注2例;正常灌注1例。结论3D-pcASL作为一种无创的MRI技术,能够客观地反映急性脑梗死区的血流灌注情况,结合DWI扫描,能够确定半暗带的范围,有一定临床意义。
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:目的探讨冠心病患者血浆纤维蛋白原(Fg)、D-二聚体(D-D)的变化。方法116例CHD患者其中单支血管病变组39例,双支血管病变组46例,多支血管病变组31例;不稳定性心绞痛(UAP)44例,急性心肌梗死(AMI)37例,稳定性心绞痛(SAP)35例与对照组77例,采集静脉血,检测血浆Fg、D-D水平,然后进行统计学处理。结果冠心病患者血浆Fg、D-D含量较非冠心病者明显升高(P〈0.01);且与冠脉病变程度及类型相关,3支病变者血浆Fg、D-D高于2支和单支病变者(P〈0.01)。急性心肌梗死(AMI)和不稳定型心绞痛(UAP)组血浆Fg、D-D水平较稳定型心绞痛(SAP)组及非冠心病组明显升高(P〈0.01)。结论血浆Fg、D-D水平与冠心病的发病及病变程度密切相关。对预测心血管事件和判断冠脉病变严重程度有参考价值。
简介:Beforethe1950s,D-transpositionofthegreatarterieswasassociatedwithnearly90%mortalitywithinthefirstyearoflife.TheMustardandSenningproceduresresultedinasignificantincreaseinthelifespanofthesepatientsbutwithnotablelong-termcomplications,includingarrhythmias,sinusnodedysfunction,chronotropicincompetence,andrightventricularsystolicdysfunction.Thearterialswitchoperation(firstdescribedbyAdibJatene)initiallyresultedinnearlyuniversaldeath.However,theuseofcoronarybuttonsforcoronaryarterytranslocationhasimprovedoperativesurvivaldramatically.Itisnowconsideredthetreatmentofchoiceinpatientsamendabletothearterialswitchoperation.Consideredananatomicrepair,resultinginconcordantventriculoarterialconnectionsandasystemicleftventricle,thearterialswitchoperationreducestheincidenceofventriculardysfunction.However,itisalsoassociatedwithlong-termcomplications,includingaorticrootdilatation,aorticvalveregurgitation,rightventricularoutflowtractobstructions,coronaryarterystenosis/compression,andbranchpulmonaryarterystenosis.
简介:目的:探讨临床表现、心电图1QⅢTⅢ特征、血浆D-二聚体(DD)水平与肺栓塞(PE)诊断的关系。方法:回顾性分析我院2012年6月至2014年5月进行肺动脉CT血管成像(CTA)的212例住院患者的临床资料。根据肺动脉CTA检查结果,患者被分为PE组(56例)和无PE组(156例)。收集患者住院基本资料,包括临床表现、ECG特征及血浆DD水平,并在两组间进行比较。结果:与无PE组比较,PIE组呼吸困难(44.87%比75%),长期卧床(3.85%比14.29%)患者比例显著升高,无临床表现比例显著降低(38.46%比3.57%),P均〈0.01。PE组ECG具有SIQⅢTm特征的患者比例显著高于元PE组(50%比23.08%),P〈0.01。与无PE组比较,PE组血浆DD〉10μg/ml比例显著升高(19.23%比32.14%),P〈0.05。结论:临床症状有呼吸困难和/或长期卧床者,出现其他心肺疾患不能解释的临床表现时;ECG具有SIQⅢTⅢ特征;DD明显升高(〉10μg/m1)者应考虑肺栓塞的可能性。
简介:ObjectivesToinvestigatetheeffectsofadrenergicreceptorantagonist(metoprololorprazosin)onmyocardialα1-ARdensityandthechangesofventriculareffectiverefractoryperioddispersion(VERP-D)inrabbitsaftermyocardialinfarction.Methodstwenty-fouradultmaleNewZealandrabbitsweredividedintofourgroupsatrandom:controlgroup(n=6);MIwithplacebogroup(n=6);MIwithmetoprololgroup(n=6);MIwithprazosingroup(n=6).Therabbitsreceivedcorrespondingdrugsforsevendays,beginningatthefirstdayafterMIandmyocardialα1-ARdensityweremeasuredandmeanwhile,myocardialβ-ARwasalsomeasured.ResultsIntheplacebogroup,thedensityofventricularα1-ARwasincreasedincomparisonwithcontrolgroup(α1-ARinnormalregion36.9±0.2vs27.3±0.9fmolmg-1Pro-1,p<0.01;α1-ARinischemicregion33.0±0.9vs26.6±0.4fmolmg-1pro-1P<0.01).Inthemetoprololgroup,itwasalsoincreasedincomparisonwithcontrolgroup(α1-ARinnormalregion44.7±1.5vs27.3±0.9fmolmg-1pro-1,P<0.01;α1-ARinischemicregion33.6±0.5vs26.6±0.4fmolmg-1pro-1,P<0.01).Meanwhilethedensityofventricularα1-ARinnormalregioninthemetoprololgroupwasincreasedincomparisonwithplacebogroup(44.7±1.5vs36.9±0.2fmolmg-1pro-1,P<0.01).Whileitdecreasedintheprazosingroupincomparisonwithcontrolgroup(α1-ARinnormalregion22.5±0.6vs27.3±0.9fmolmg-1pro-1,P<0.01;α1-ARinischemicregion20.9±0.4vs26.6±0.4fmolmg-1pro-1,P<0.01).VERP-DwasincreasedafterMI(P<0.01).Aftertreatmentwithmetoprololorprazosin,VERP-Dwasdecreased(P<0.01).ConclusionsAfteracuteMI,α1-ARofventricularmyocardiumwasupregulated,whichmaybeaccompaniedbyitsactivitation.Thedensityofmyocardialα1-ARbecameupregulatedmoredramaticallytreatedwithmetoprololanddownregulatedwithprazosin.Whentreatedwithmetoprololorprazosin,VERP-Ddecreased.
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.