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左心室流出道

左心室流出道的相关文献在1989年到2022年内共计93篇,主要集中在内科学、基础医学、生理学 等领域,其中期刊论文91篇、会议论文1篇、专利文献2489篇;相关期刊44种,包括中国中医基础医学杂志、中国病理生理杂志、中国应用生理学杂志等; 相关会议1种,包括2015中国心电学论坛等;左心室流出道的相关文献由189位作者贡献,包括王雪芳、林加锋、焦宏等。

左心室流出道—发文量

期刊论文>

论文:91 占比:3.53%

会议论文>

论文:1 占比:0.04%

专利文献>

论文:2489 占比:96.44%

总计:2581篇

左心室流出道—发文趋势图

左心室流出道

-研究学者

  • 王雪芳
  • 林加锋
  • 焦宏
  • 林佳选
  • 赵兰平
  • 马建伟
  • 张晓云
  • 李进
  • 李岳春
  • 陈彦静

左心室流出道

-相关会议

  • 期刊论文
  • 会议论文
  • 专利文献

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    • 艾慧俊; 施振华; 陈君美; 戴丽雅; 周宁; 陈方红
    • 摘要: 目的探讨Valsalva动作在非肥厚型心肌病患者隐匿性左心室流出道梗阻诊断中的应用。方法选择2019年5月至2021年12月丽水市中心医院不典型胸痛患者800例,行常规超声心动图联合Valsalva动作检查。测量静息期及Valsalva动作后二尖瓣口舒张早期峰值流速(E)、舒张晚期峰值流速(A)、比值(E/A)、左心室舒张末期容积(LVEDV)、左心室流出道流速及压差的水平变化。结果发现隐匿性左心室流出道梗阻57例(7.13%),其中二尖瓣前叶冗长5例(8.77%),左心室假腱索3例(5.26%),乳头肌肥大3例(5.26%),室间隔增厚28例(49.12%),室间隔成角7例(12.28%),混合型(两种及以上)11例(19.30%)。隐匿性左心室流出道梗阻患者Valsalva动作后的E、A、E/A,LVEDV均低于静息状态水平,左心室流出道流速、压差均高于静息状态水平,差异均有统计学意义(均P<0.05)。结论Valsalva动作可用于不典型胸痛患者隐匿性左心室流出道梗阻的检测。
    • 冼俊秀; 苏春晓; 陈辉; 曾德才; 蒋春兰; 吴棘
    • 摘要: 目的 探讨超声心动图二尖瓣和左心室参数对二尖瓣前瓣收缩期前向运动(SAM)的评估价值.资料与方法 回顾性分析经超声心动图确诊的46例SAM患者,并纳入健康体检者30例作为对照组,比较两组二尖瓣与左心室结构参数的差异;采用受试者工作特征曲线获得各参数预测SAM的最佳截断值;分析各参数与左心室流出道(LVOT)压差的相关性.结果 SAM组二尖瓣环内径、后瓣长度、前瓣角度、室间隔基底段厚度、LVOT压差、左心室射血分数大于对照组(t=4.53、6.73、3.68、13.98、7.33、3.59,P均0.05).室间隔基底段厚度、LVOT压差、C-septum与对合点水平左心室内径比值、C-septum的曲线下面积分别为0.991、0.973、0.970、0.960,截断值分别为11.75 mm、27.5 mmHg、0.5、15.95 mm.室间隔基底段厚度(r=0.807)、C-septum与该水平左心室内径比值(r=-0.816)、C-septum(r=-0.840)与LVOT压差的相关性较强(P均<0.05).结论 室间隔基底段厚度、C-septum及C-septum与对合点水平左心室内径比值对SAM有较高的评估价值.
    • 翁淑贤
    • 摘要: 胸闷头晕,查出肥厚型便阻性心肌病叶伯年近七旬,多年前曾因频发室性早搏做过手术,治疗后恢复良好,当时心脏彩超检查发现叶伯左心室流出道前向血流有增快的现象,其他方面功能并没有什么异常。近两年来叶伯时常感觉胸闷,偶尔会头晕乏力,到底怎么回事?
    • 虞虹艳; 林佳选; 李嘉; 李岳春; 李进; 季亢挺; 殷日鹏; 林加锋
    • 摘要: 目的 探讨左心室流出道(LVOT)及其邻近结构不同起源室性心律失常(VAs)的心电图(ECG)特征及鉴别流程.方法将272例射频消融成功,经X线或三维标测证实有效靶点在LVOT及其邻近结构的VAs患者纳入本研究,并分为以下6组:(1)左冠窦(LCC)组110例;(2)右冠窦(RCC)组35例;(3)左右冠窦交界处(L-RCC)组16例;(4)左冠窦下(ILCC)组42例;(5)二尖瓣环前壁心内膜(end-MAA)组18例;(6)心大静脉远端移形区(DGCV)组51例.比较LVOT及其邻近结构不同部位VAs的ECG特征,以鉴别指标的灵敏度、特异度、阳性及阴性预测值为依据制定诊断流程.结果(1)以假性δ波时间≥54ms作为鉴别DGCV与LCC、RCC、L-RCC、ILCC和end-MAA的指标,其灵敏度86.27%,特异度90.95%,阳性预测值68.75%,阴性预测值96.63%.(2)以Ⅰ导联呈R、Rs或r型作为诊断RCC及L-RCC和心大静脉远端延伸支(EDGCV)的指标,其灵敏度、特异度、阳性及阴性预测值分别为92.16%、81.18%、59.47%、97.87%和66.67%、97.62%、85.71%、93.18%;(3)以V1及V4~V6导联均呈单向R波作为诊断ILCC或DGCV2的指标,其灵敏度、特异度、阳性及阴性预测值分别为73.81%、97.21%、86.11%、94.05%及84.62%、94.74%、84.62%、94.74%;(4)以V1呈R型、V4~V6呈Rs型作为诊断DGCV1的指标,其灵敏度、特异度、阳性及阴性预测值分别为90.91%、97.50%、90.91%、98.90%;(5)以V1呈qrS或QS型作为诊断L-RCC起源的指标,其灵敏度100.00%、特异度96.59%、阳性预测值69.57%、阴性预测值100.00%.结论LVOT及其邻近结构VAs并非罕见,体表12导联ECG对其鉴别有较大的临床价值,认识这些特点,对术前初步判断可能的有效靶点,缩短手术时间及X线曝光时间有一定的意义.
    • 吕淑懿; 赵博文; 郭俏俏; 潘美; 王蓓; 彭晓慧; 陈冉
    • 摘要: 目的 评价胎儿心脏自动容积导航技术(smart-planes fetal heart,S-planes FH)获得胎儿心室流出道切面的可行性,同时比较S-planes FH和二维超声心动图(2DE)测量胎儿主动脉(AO)与肺动脉(PA)内径的一致性.方法 选取185例中晚孕期胎儿作为研究对象.进行2DE检查,测量胎儿A O与PA内径.再应用三维容积探头通过表面模式获取胎儿心脏容积数据并存储,利用S-planes FH软件对数据进行脱机分析,对显示清晰的AO、PA进行测量.采用线性Pearson相关分析法评价两种方法测得AO、PA的相关性.应用Bland-Altman分析验证两种方法的一致性.结果 185例胎儿经2DE检查均能获得满意的胎儿心室流出道切面,其中173例(93.5%)应用S-planes FH成功获取了胎儿心室流出道切面.经线性Pearson相关分析显示,两种方法测量AO、PA内径值有很好的相关性(r=0.84,P=0.04;r=0.81,P=0.00).Bland-Altman分析显示两种方法有较好的一致性,95% 一致性界限分别为(-1.17,1.00)、(-1.79,1.02).结论 应用S-planes FH和常规2DE测量胎儿AO、PA内径值具有良好的一致性,S-planes F H获得流出道切面具有较高的可靠性及重复性.%Objective To explore the feasibility of smart-planes fetal heart ( S-planes FH ) in the display of the fetal ventricular outflow views ,and to compare diameters of fetal aorta ( AO) and pulmonary artery (PA) measured using two-dimensional echocardiography(2DE) and S-planes FH . Methods One hundred and eighty-five fetuses with gestational age of 17 - 36 weeks were enrolled . Each fetus had undergone conventional 2DE examination and the three-dimensional fetal cardiac volume datasets were obtained . The volume datasets were analyzed offline using S-planes FH . The diameters of AO and PA were measured by 2DE and S-planes FH ,respectively . Pearson correlation analysis was used to evaluate the correlation between the two methods for measuring the diameters of AO and PA . The consistency of the two methods was verified by Bland-Altman analysis . Results Fetal ventricular outflow views were successfully obtained using S-planes FH in 173 ( 93 .5% ) cases of 185 fetuses whose ventricular outflow views were satisfactorily obtained by fetal 2DE . There were close correlations between the two methods in measuring the diameters of AO and PA ( r = 0 .84 , P = 0 .04; r = 0 .81 , P = 0 .00 ) . Bland-Altman analysis showed a close consistency between the two methods ,and their 95% confidence intervals were ( -1 .17 ,1 .00) and ( -1 .79 ,1 .02) ,respectively . Conclusions There is a close consistency between S-planes FH and 2DE in measuring fetal AO and PA . S-planes FH may have potential for the evaluation of fetal ventricular outflow .
    • 李进; 郑程; 林佳选; 李嘉; 李岳春; 林加锋
    • 摘要: 目的 探讨心室流出道(VOT)及邻近结构间优先与多通道传导现象的心电图及电生理特征.方法 纳入2007年8月至2017年12月在温州医科大学附属第二医院进行射频消融治疗的特发性室性早搏(PVC)/室性心动过速(VT)1 891例,其中1 346例起源于VOT及邻近结构[右心室流出道(RVOT)、肺动脉窦、左心室流出道(LVOT)、二尖瓣主动脉瓣连接区(AMC)及心大静脉远端(DGCV)移行区],仅44例(3.27%)符合VOT及邻近结构间优先与多通道传导现象的心电图及电生理特征者入选本研究,男20例,年龄(49.03±13.60)岁,年龄范围28~72岁.对比各例的消融靶点的激动标测,起搏标测和SR间期结果并进行分析.结果 ①优先传导共32例(72.73%),其中LVOT起源经RVOT,优先传导22例(50.00%),肺动脉窦上起源经RVOT或LVOT优先传导分别为5例(11.36%)及2例(4.55%),邻近DGCV延伸支起源经RVOT、左冠窦(LCC)起源经AMC优先传导2例(4.55%),AMC起源经左心室前壁(LVAW)优先传导1例(2.27%);②LVOT起源经LVOT及RVOT多通道传导及RVOT起源经RVOT及LVOT多通道传导共7例(15.91%);③肺动脉瓣上起源经RVOT优先与RVOT或LVOT多通道传导共存5例(11.36%).优先传导组和优先与多通道传导共存组的最后消融靶点领先度优于初始消融靶点(P<0.O1),SR间期较初始消融靶点延长(P<0.01).结论 VOT及邻近结构间优先与多通道传导现象存在多种类型,消融PVC/VT的过程中会发生心电图的形态变化,激动标测的领先度和起搏标测的SR间期可以帮助判断有效靶点.%Objective To investigate the electrophysiologic and electrocardiographic characteristics of the preferential conduction and multi-channel conduction in the ventricular outflow tract (VOT) and the adjacent structures.Methods From August 2007 to December 2017,a total of 1 891patients were presented for catheter ablation for idiopathic premature ventricular contractions (PVCs) or idiopathic ventricular tachycardias (IVTs) at the Second Affiliated Hospital of Wenzhou Medical College.One thousand three hundred and forty-six of the 1 891 patients were found to have idiopathic PVCs/IVTs originating from the ventricular outflow tract (VOT) and the adjacent structures including right ventricular outflow tract (RVOT),left ventricular outflow tract (LVOT),sinus of pulmonary trunk,aorto-mitral continuity (AMC),and distal great cardiac vein (DGCV) transitional zone,and only 44 (3.27%)were conformed to the electrophysiologic and electrocardiographic characteristics of the preferential conduction and multi-channel conduction in the VOT and the adjacent structures.Comparing the activation mapping,pacing mapping and SR interval results of each ablation target.Results ①A total of 32 cases (72.7%) were found to have prfferential conduction of idiopathic PVCs/IVTs,including 22 cases (50%) of preferential conduction across RVOT in VA originating from LVOT,5 cases (11.4%) across RVOT in VA originating from sinus of pulmonary trunk,and each case across RVOT in VA originating form DGCV transitional zone,across AMC in VA originating from LCC and across LVAW in VA originating from AMC (respectively accounting for 2.3%).②A total of 7 cases (15.9%) were found to have multi-channel conduction,including cases originating trom LVOT and RVOT conducting via multi-channel between R V OT and L V OT.③Five cases (11.4 %)were found the coexistence of the preferential conduction across R V OT originating from above the pulmonary valve and multi-channel between RVOT and LVOT.The final ablation target of preferential conduction group and preferential conduction multi-channel conduction coexist group were better in preceding time of the local ventricular activation than the initial ablation target (P<0.01),SR interval prolonged(P<0.01).Conclusion The phenomenon of the preferential conduction and multi-channel conduction exist in the PVCs/VT originating from VOT and the adjacent structures,which induce a dynamic change of PVCs/VT morphology during the procedure of radiofrequency catheter ablation.The time of the local ventricular activation preceding the QRS onset during activation mapping and SR interval during pace mapping could help localize the target site of PVCs/VT and facilitate an effective ablation.
    • 邓荷萍; 蒲岷
    • 摘要: 目的 应用三维经食管超声心动图(3D TEE)研究左室流出道(LVOT)形态,探讨连续方程法低估主动脉瓣口面积的理论依据.方法 回顾性分析2010年5月至2011年2月美国维克森林大学医学中心50例患者的二维经胸超声心动图(2D TTE)及3DTEE资料,在远段(主动脉瓣环,A1)、中段(主动脉瓣环以下5 mm,A2)、近段(主动脉瓣环以下10 mm,A3)三个平面测量LVOT直径并计算LVOT横截面积(CSA).比较2D TTE圆形面积公式(2D TTEcircular)、3D TEE椭圆形面积公式(3D TEEel iptical)与3D TEE几何学方法(3D TEEplanimetry)计算的CSA与搏出量(SV).结果 3D TEE显示多数患者LVOT呈漏斗形(76%),CSA在A1平面最小,呈圆形,在A2及A3平面增大,呈椭圆形.在A1平面,CSAcircular、CSAel iptical、CSAplanimetry分别为(3.7±0.9)cm2、(3.9±0.8)cm2、(3.9±1.0)cm2,差异无统计学意义(F=1.025,P=0.45);在A2及A3平面,CSAcircular分别为(3.4±0.8)cm2、(3.5±0.9)cm2,显著小于CSAplanimetry的(4.0±1.0)cm2、(5.0±1.4)cm2,差异有统计学意义(F=8.055、22.098,P=0.001、<0.001).A1平面,SVcircular及SVel iptical、SVplanimetry差异无统计学意义(F=0.579,P=0.56);A2及A3平面,SVcircular分别为(64±18)ml、(67±19)ml,显著小于SVplanimetry的(76±23)ml、(95±33)ml(F=5.168、15.638,P=0.004、<0.001).结论 LVOT呈不规则漏斗形,其最小横截面积位于瓣环水平;应用三维超声心动图测量LVOT直径或CSA能够更准确地计算左室每搏量,避免低估主动脉瓣口面积,提高判断主动脉瓣狭窄程度的准确性.
    • 邸成业; 李康; 丁燕生; 林文华
    • 摘要: Objective This study was aimed to investigate the mapping,surface electrocardiogram(ECG) characteristics and ablation strategies of premature ventricular contraction (PVC) under the left coronary cusp(LCC).Methods From August 2009 to August 2016,62 left ventricular outflow tract (LVOT) PVC patients,who underwent the radiofrequency catheter ablation (RFCA) in the TEDA International Cardiovascular Hospital were selected.Based on the mapped and ablated areas,all patients were divided into three groups:posterior part under the LCC,anterior part under the LCC and in the LCC part as control group.Results In the posterior part group(51 patients),35 patients with perfect target potential or pacing map,direct ablation to this site was able to eliminate the PVC immediately,16 patients(10 patients could temporarily eliminate the PVC,but PVC reappeared after ablation,the other 6 patients could not eliminate the PVC at all) could not got perfect target potential or pacing map,later effect eliminated the PVC.In the anterior part group(11 patients),10 patients with perfect target potential or pacing map,direct ablation to this site was able to eliminate the PVC immediately,one patients could not eliminate the PVC at all,later effect eliminated the PVC.In the LCC part,61 patients with perfect target potential or pacing map,direct ablation to this site was able to eliminate the PVC immediately.1 patients could not got perfect target potential or pacing map,later effect eliminated the PVC.Conclusions Left ventricular outflow tract PVC with perfect target potential or pacing map represent the PVC origin or PVC outlet,ablation can eliminate the PVC immediately.PVC without perfect target potential or pacing map means there is a small distance between the PVC origin/outlet and the ablation site,later effect can eliminate the PVC sometimes.%目的 探讨左冠窦(LCC)瓣下消融成功的室性早搏(PVC)的心电图特征和射频消融方法.方法 本研究回顾性分析2009年8月至2016年8月在泰达国际心血管病医院于LCC瓣下成功行射频消融的62例PVC患者,根据靶点处是否可以记录到远场A波分为两组:LCC瓣下后部组(51例)可记录到远场A波;LCC瓣下前部组(11例)未记录到远场A波;同期选取LCC瓣上消融成功的PVC患者62例作为对照组,比较3组患者心电图、靶点图特征和射频消融治疗结果.结果 LCC瓣下后部组共51例,其中35例可标测到良好靶点图或起搏标测图形态良好,射频消融获得即刻手术成功;16例未能标测到良好靶点图且起搏标测图形态欠佳(10例消融可暂时使PVC消失,停止消融后PVC复发,6例术中消融不能使PVC减少),术后射频消融后效应使PVC消失.LCC瓣下前部组11例,其中10例可标测到良好靶点图或起搏标测图形态良好,射频消融获得即刻手术成功;1例未能标测到良好靶点图且起搏标测图形态欠佳,术中消融不能使PVC减少,术后射频消融后效应使PVC消失.LCC瓣上组62例,其中61例可标测到良好靶点图或起搏标测图形态良好,射频消融获得即刻手术成功;1例虽可标测到良好靶点图且消融有效,但停止消融后PVC很快复发,术后射频消融后效应使PVC消失.结论 LCC瓣上可标测到PVC良好靶点图或起搏标测图形态良好者,消融几乎均可获得即刻手术成功;LCC瓣下可标测到PVC良好靶点图或起搏标测图形态良好者,消融部位为室早起源点或出口,消融可获得即刻手术成功;未能标测到良好靶点图且起搏标测图形态欠佳者,可经验性于LCC瓣下消融,虽然射频消融不能获得即刻成功,但射频消融后效应会使损伤面积扩大而累及PVC起源点或出口,从而达到根治PVC的目的.
    • 赵兰平; 薛淑芳; 陈彦静; 王雪芳; 陈立锋; 黄嘉诚
    • 摘要: 目的:研究内源性一氧化氮合酶(NOS)抑制物非对称性二甲基精氨酸(ADMA)对豚鼠左心室流出道自律细胞电活动的影响,探讨ADMA在源于心室流出道心律失常发生发展中的作用.方法:制备豚鼠离体左心室流出道标本,用氧饱和的改良Locke液进行恒温、恒速灌流,采用标准玻璃微电极细胞内电位记录技术记录豚鼠离体左心室流出道部位的自发慢反应电位(sAP),观测该电位对ADMA的浓度依赖性效应,ADMA分为3个浓度组(1、10和100 μmol·L-1);用NO供体硝普钠(SNP)灌流预处理标本,分为对照组、SNP(10 μmol·L-1)组和SNP+ ADMA组,记录并分析SNP预处理对ADMA所致左心室流出道电生理效应的影响.结果:与对照组比较,1 μmol· L-1 ADMA组sAP各项指标均无明显变化(P>0.05),10和100 μmol·L-1ADMA组4相自动去极速度(VDD)、自发放电频率(RPF)和0相最大除极速度(Vmax)明显减慢(P<0.05),复极50%和90%时间(APD50和APD90)明显延长(P<0.05),100 μmol·L-1 ADMA组动作电位幅度(APA)明显减小(P<0.05);与1μmol·L-1 ADMA组比较,10 μmol·L-1 ADMA组RPF、APD90及100 μmol·L-1 ADMA组RPF、Vmax和APD50差异有统计学意义(P<0.05);与10 μmol·L-1 ADMA组比较,100 μmol·L-1ADMA组APA明显减小(P<0.05).10 μmol·L-1 SNP预处理标本10 min可逆转ADMA降低左心室流出道自发放电活动的效应,与对照组比较,VDD和RPF仍明显加快(P<0.05),Vmax和APA有恢复至对照组水平的趋势(P>0.05),APD90明显缩短(P<0.05).结论:内源性NOS抑制物ADMA浓度依赖性降低左心室流出道自律细胞的自发放电活动,NO供体SNP预处理可逆转上述效应.
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