超声心动图诊断肺静脉异位引流的价值研究

目的 探讨超声心动图对肺静脉异位引流的诊断价值。方法 采用回顾性分析法,收集2010年1月至2019年12月驻马店市中心医院收治的56例肺静脉异位引流患者的临床资料,所有患者均经CT血管造影检查及手术确诊,且入院时均给予超声心动图进行检查,以CT血管造影检查及手术结果作为依据,分析超声心动图对诊断肺静脉不同异位引流程度(部分性肺静脉异位引流、完全性肺静脉异位引流)以及病理组织学类型(心上型、心内型、心下型、混合型)的符合情况;分析超声心动图对肺静脉异位引流的诊断价值。结果 以CT血管造影检查及手术结果作为依据,超声心动图检查完全性肺静脉异位引流的符合率为85. 00%(17/20)、部分性肺静脉异位引流的符合率为97. 22%(35/36);超声心动图对不同异位引流程度的检查准确度为92. 86%(52/56);超声心动图诊断肺静脉异位引流的不同异位引流程度与CT血管造影检查及手术结果具有极好一致性(Kappa=0. 841)。超声心动图检查对病理组织学类型诊断的总符合率为91. 07%(51/56),其中对心上型诊断符合率为88. 89%(16/18)、心内型诊断符合率为95. 24%(20/21)、心下型诊断符合率为90. 00%(9/10)、混合型诊断符合率为85. 71%(6/7);超声心动图诊断肺静脉异位引流的病理组织学类型与CT血管造影检查及手术结果具有极好的一致性(Kappa=0. 874)。结论 超声心动图对肺静脉异位引流具有一定诊断价值,可准确评估患者不同异位引流程度以及病理组织学类型,为临床诊治提供重要参考依据。     

血流向量成像技术评价左上肺静脉血流流场特点

目的 探讨血流向量成像(VFM)技术评价左上肺静脉(LSPV)血流流场特点的可行性和应用 价值.方法 应用VFM 技术的流线、二维速度向量及涡流模式观察行经食管超声心动图检查(TEE)的22 例受检者心动周期各时相左上肺静脉的血流特点.结果 自等容收缩期到舒张中期,血流流线及速度向量 方向皆由左上肺静脉起始段指向左心房段,舒张晚期可见血流流线及速度向量起自左上肺静脉左心房段,逆 向进入左上肺静脉起始段和中段.自等容收缩期到收缩中晚期流线及速度向量线由稀疏逐渐变浓密,进入 舒张早期渐稀疏,于舒张中期又渐浓密.73%的受检者于收缩末期、舒张早期、舒张中期左上肺静脉中段或 左心房段出现涡流.结论 VFM 技术可无创显示左上肺静脉血流的流线、二维速度向量及涡流特点.     

多层螺旋CT诊断完全型肺静脉异位引流

目的 探讨多层螺旋CT(MSCT)在完全型肺静脉异位引流(TAPVC)诊断中的应用。方法 分析25例经手术证实的TAPVC患者MSCT增强扫描图像及多平面重建、曲面重建、最大密度投影、容积再现图像。结果 MSCT 正确诊断2 5例TAPVC,准确率100%。本组病例均伴有心房畸形,MSCT诊断房间隔缺损和室间隔缺损的准确率分别为83.33%(15/18)和81.82%(9/11)。对单心房、单心室、大动脉转位、右室双出口、动脉导管未闭、右心房异构、三尖瓣闭锁、肺动脉瓣下狭窄、肺动脉闭锁、主动脉弓发育不良及肺动脉高压,MSCT与手术结果完全符合。结论 MSCT对于TAPVC及其合并的其他畸形具有重要的诊断价值。     

经胸超声心动图诊断儿童肺静脉异位连接

目的 探讨儿童肺静脉异位连接的超声表现以及经胸超声心动图(TTE)诊断价值.方法 回顾性分析经手术证实的31例肺静脉异位连接患儿,其中男22例,女9例,年龄22天～10岁,完全型肺静脉异位连接(TAPVC)18例,部分型肺静脉异位连接(PAPVC)13例.结果 31例APVC在TTE中均有右心负荷增加表现.18例TAPVC的解剖分型为心上型9例(50%),心内型9例(50%),16例(88.89%)经胸超声心动图诊断与手术结果完全或基本符合,2例(11.11%)误诊为部分型房室间隔缺损.13例PAPVC的解剖分型为心内型12例(92.31%),心上型1例(7.69%),均合并房间隔缺损,其中9例(69.23%)合并静脉窦型房间隔缺损;9例(69.23%)TTE诊断与手术结果完全或基本符合,4例(30.67%)误诊为单纯房间隔缺损.结论 超声心动图发现右心增大时,无论是否伴有房间隔缺损,均应注意常规检查4条肺静脉入口位置及血流方向.     

心房颤动与窦性心律肺静脉血流的对比研究

目的：观察心房颤动与窦性心律肺静血流频谱,以对比评价房颤时的肺静脉血流动力学变化及价值。方法：用经食管超声多普勒技术（ＴＥＥ）记录并分析７４例房颤患者和２０例窦律对照的肺静脉血流频谱,并与对比研究。结果：房颤患者肺静脉和因流的心房收缩期负向Ｐ波,心室收缩早期正向Ｓ１波消失,心室收缩早期存在负向血流Ｒ波,心室收缩中晚期正向血流Ｓ２波、心室舒张期正向血流Ｄ波较窦律要应峰值速率平均值降低。Ｓ２／Ｄ由这     

陈旧性心肌梗塞不同收缩功能肺静脉血流频谱分析

目的:研究陈旧性心肌梗塞患者不同左室收缩功能状态时肺静脉血流频谱的变化.方法:陈旧性心肌梗塞83例,根据左室射血分数(LVEF)分为三组:LVEF＞50%者38例,LVEF40～50%者25例,LVEF＜40%者20例;分别测定肺静脉血流频谱S 及其积分、D及其积分、AR及其积分、S/D、AR波持续时间与A波持续时间的比值(ARd/Ad),二尖瓣血流频谱E及其积分、A及其积分、E/A、EDT,左室等容舒张时间IRT.结果:陈旧性心肌梗塞各组S、AR、ARd/Ad与对照组比较,差异均有显著性, 各组间S、S/D、AR、ARd/Ad、IRT比较差异均有显著性.结论:陈旧性心肌梗塞患者不同左室收缩功能状态时存在着程度不等的左室舒张功能异常,IRT和二尖瓣血流频谱结合肺静脉血流频谱可更全面地反映左室舒张功能.     

肺静脉血流评价小儿先天性心脏病左心室舒张功能

目的探讨肺静脉血流方法评价先天性心脏病(先心病)患儿左心室舒张功能的应用价值.方法 35例患病组于术前1周内及术后1个月应用肺静脉血流频谱评价左室舒张功能并与二尖瓣口血流方法比较,同时与37例正常对照组进行对比研究.患病组据心室负荷分左心型和右心型.结果左心型术前D波增高,S/D与TS/TD比值下降,术后S波D波速度较术前明显降低,S/D比值增加,TS增加,TD减低,TS/TD比值增加.右心型术前S波增高,S/D比值增高,TS/TD比值下降,术后D波速度增加,S/D比值减低,TS/TD比值增加.患病组中71%二尖瓣口血流E/A比值正常,其中92%通过肺静脉血流频谱TS/TD比值异常检测出左室舒张功能异常,56%肺静脉血流频谱S/D比值异常.结论肺静脉血流方法是评价先心病患儿术前左室舒张功能的可靠方法,可鉴别二尖瓣血流E/A比值假性正常.     

心功能不全患者二尖瓣、肺静脉血流频谱变化特点

目的分析心功能不全患者限制性充盈(RF)和非限制性充盈(NRF)时二尖瓣血流频谱(MFP)和肺静脉血流频谱(PVFP)的变化特点.方法选择48例左室收缩功能不全(LVEF＜0.45)的陈旧性心肌梗塞患者和28名健康对照为研究对象.采用经胸多普勒超声心动图(TDE)检测MFP和PVFP.结果按照二尖瓣舒张早期最大血流速度(E)与舒张晚期最大血流速度(A)的比值(E/A)和E波减速时间(DT)将病例组分为RF组和NRF组.和对照组比较,NRF组E和E/A减小(P均＜0.01),A、肺静脉反向血流(PA)波与A波间期之差(PAdAd)、收缩期肺静脉最大血流速度(S)及其与舒张早期肺静脉最大血流速度(D)的比值(S/D)增大(P＜0.05～0.01),DT延长(P＜0.05),左室舒末内径(LVD)轻度扩大(51.3±5.68mm,P＜0.05);RF组E、E/A、D和PAd-Ad增大(P＜0.05～0.001),A、S、S/D、SF和PA减小(P＜0.05～0.001),DT缩短(P＜0.05),LA(41.61±7.56)mm和LVD(63.5±10.29)mm显著扩大(P均＜0.001).RF组与NRF组比较,LVEF减低6%(P＜0.05),心功能分级Ⅲ～Ⅳ(NYHA)患者所占比例较大(P＜0.005).结论NRF组和RF组患者的MFP和PVFP参数均有不同程度的异常.较之NRF组,RF组MFP和PVFP有显著异常,收缩功能障碍和心室重构严重,表明限制性充盈是严重充血性心力衰竭的标志,结合应用MFP和PVFP能更好地评价左室舒张功能.     

肺静脉与二尖瓣血流频谱A峰速度比值评价左心室收缩功能不全患者左心舒张功能的研究

目的探讨肺静脉与二尖瓣血流频谱A峰速度比值(PV-A/A)在评价左心室收缩功能不全患者左心舒张功能中的价值。方法46例左心室收缩功能不全患者及15例左心室收缩功能正常者分别作为研究组和对照组,根据Simpson法测量的左心室射血分数(LVEF)将研究组分为3个亚组,15例轻度左心收缩功能不全(组Ⅰ)LVEF为40%～50%,14例中度左心收缩功能不全(组Ⅱ)LVEF为30%～39%,17例重度左心功能收缩不全(组Ⅲ)LVEF为20%～29%。采用经胸超声检测受检者二尖瓣口舒张早期E峰速度、舒张晚期A峰速度,计算E峰速度和A峰速度比值(E/A);检测肺静脉舒张晚期A峰速度(PV-A),并计算PV-A/A值。结果研究组LVEF与对照组相比均降低(P<0.01),以组Ⅲ最低。组Ⅲ二尖瓣口血流频谱E峰速度较组Ⅰ和组Ⅱ增高(P<0.01或0.05)。组Ⅲ中二尖瓣口A峰流速较其他组明显降低(P<0.01或P<0.05),而组Ⅰ中A峰流速最高。组Ⅲ的E/A值较其他3组增高(P<0.01)。PV-A值在组Ⅰ、组Ⅲ和对照组间差异无统计学意义,组Ⅱ的PV-A值较其他组增高(P<0.01或P<0.05)。组Ⅲ的PV-A/A较其他组明显增高(P<0.01或P<0.05)。结论PV-A/A能够反映左心室收缩功能不全时左心室充盈压力的增高,可较准确地评价左心室收缩功能不全时的左心舒张功能。     

心上型部分性肺静脉异位引流的超声诊断及漏诊分析

目的与CT结果对比分析,探讨超声心动图在心上型部分性肺静脉异位引流(PAPVC)诊断中的应用价值。方法回顾性分析14例在我院经CT和手术证实为心上型PAPVC的超声心动图表现,并与CT结果进行对比分析。结果 14例心上型PAPVC,9例合并简单先心病,1例合并右位心、单心室等复杂先心病,4例为单发。超声心动图确诊5例(36%),漏诊6例(42%),疑诊3例(22%)。结论超声心动图可诊断心上型肺静脉异位引流,但易漏诊,异位肺静脉引流入上腔静脉的位置、方向是漏诊的主要原因,关注超声间接征象及联合CT可提高诊断率。     

Transesophageal Doppler echocardiographic assessment of pulmonary venous flow pattern in subjects without cardiovascular disease

This study was designed to assess pulmonary venous flow dynamics using transesophageal Doppler echocardiography. Under general anesthesia, we studied 54 surgical patients with no history or physical evidence of cardiac disorders. In all patients pulmonary venous flow was easily identified by transesophageal color flow mapping. Pulmonary venous flow pattern, which was obtained clearly in 85% (4654) of patients by transesophageal pulsed Doppler echocardiography, was tri- or quadriphasic. The first wave, which was often biphasic in elderly patients, occurred during ventricular systole (S wave). The second wave occurred in diastole during the early ventricular filling phase of mitral flow (D wave). The third wave was reverse flow toward the pulmonary vein during atrial contraction (A wave). The following variables were measured: the peak flow velocities of each wave (PFVs, PFVd, PFVa), and the ratio of PFVs to PFVd (PFV(S/D)). The PFVd correlated with age (r=?0.56, P<0.001), indicating age-related decrease. The PFV(S/D) correlated with age (r=0.61, p<0.001), indicating age-related increase. These results would indicate that the contribution of pulmonary venous flow during diastole to total pulmonary venous flow decreases with age. Our data suggest that age-related diastolic dysfunction of the left ventricle would affect pulmonary venous flow dynamics and that left atrial storage volume during ventricular systole would increase with age.     

妊娠高血压疾病胎儿肺静脉血流参数在左心舒张功能评估中的临床价值

目的 探讨妊娠期高血压疾病(HDCP)胎儿肺静脉(PV)血流参数在左心舒张功能评估中的价值。方法 选择我院产科2017年7月至2018年11月收治的HDCP患者137例(疾病组),其中妊娠高血压49例(A组),轻度子痫前期46例(B组),重度子痫前期42例(C组),选择同期于我院产检的健康孕妇40例(对照组)。对各组胎儿进行心脏超声检查,比较各组胎儿PV血流参数,包括心房收缩期峰值流速(A)、心室收缩期峰值流速(S)、心室舒张期峰值流速(D),肺静脉搏动指数(PI)、肺静脉峰值流速指数(PVIV),分析疾病组各血流参数的相关性。并比较疾病组是否发生新生儿窒息胎儿的PV血流参数。结果 疾病组A峰流速低于对照组,PI、PVIV值高于对照组,差异均有统计学意义(P＜0.05);     

Transesophageal echo-Doppler echocardiographic assessment of pulmonary venous flow patterns.

Fifty-eight of 61 consecutive patients undergoing transesophageal echo-Doppler echocardiography provided excellent signals to permit assessment of pulmonary venous blood low patterns. Normal antegrade pulmonary venous flow during ventricular systole was biphasic and was characterized by a short, low velocity (28 +/- 17 cm/sec), early systolic jet (P1), and longer, higher velocity (41 +/- 23 cm/sec), late systolic jet (P2). Antegrade pulmonary venous flow during ventricular diastole (P3) was of moderate velocity (34 +/- 17 cm/sec) and was monophasic; during atrial contraction there was transient, low velocity (-17 +/- 11 cm/sec) and reversal of flow (P4). The early systolic antegrade venous flow (P1) was absent or reversed in rhythm disorders, which interrupted normal synchronized atrioventricular activation. These rhythm disorders also were associated with diminished peak flow velocities during late systole (P2). Abnormalities in systolic left ventricular function and mitral regurgitation also had this effect. Diastolic flow velocities (P3) remained constant, except in patients with mitral regurgitation. In these patients diastolic peak flows were significantly increased above normal. In cases of atrial fibrillation or ventricular pacing the late diastolic reversal of flow resulting from atrial contraction (P4) was absent. Conclusions: Transesophageal echo-Doppler echocardiography gives high quality signals of pulmonary venous inflow to help assess function of the left ventricle and left atrium. Multiple factors affect the patterns. This study suggests caution in the interpretation of abnormal patterns, particularly of reduced systolic pulmonary vein flow in the presence of left ventricular dysfunction, atrial fibrillation, ventricular pacing, and mitral regurgitation.     

多普勒组织成像鉴别肥厚型心肌病舒张功能假性正常

目的　探讨应用多普勒组织成像 (DTI)二尖瓣环舒张速度鉴别肥厚型心肌病舒张功能假性正常。方法　在正常人与肥厚型心肌病患者中应用脉冲多普勒技术分别测量二尖瓣口舒张早期峰值速率 (E)、舒张晚期峰值速率 (A) ,肺静脉收缩波 (S)、舒张波 (D)及心房收缩波 (Ar)。转换DTI速度模式 ,测量二尖瓣环各点舒张早期峰值速率 (Ea)、舒张晚期峰值速率 (Aa)并计算Ea/Aa。结果　肥厚型心肌病舒张功能假性正常患者与正常人二尖瓣E、A、E/A差异无显著性意义 (均 P >0 .0 5 ) ,肺静脉S、S/D、Ar差异有显著性意义 (均 P <0 .0 1) ,二尖瓣环Ea及Ea/Aa差异有显著性意义 (P <0 .0 1) ,Aa差异无显著性意义 (P >0 .0 5 )。结论　多普勒组织成像二尖瓣环Ea及Ea/Aa可鉴别肥厚型心肌病舒张功能假性正常     

多普勒组织成像鉴别陈旧性心肌梗死患者舒张功能假性正常

目的 探讨应用多普勒组织成像（DTI）检测二尖瓣环舒张期运动速度可否鉴别陈旧性心肌梗死（OMI）患者舒张功能假性正常。 方法 OMI舒张功能假性正常患者68例，正常对照组50例，应用脉冲多普勒（PWD）分别测量二尖瓣口舒张早期峰值流速（E）、舒张晚期峰值流速（A）、E／A、E峰减速时间（DT）、左室等容舒张时间（IRT）、肺静脉收缩波（S）、舒张波（D）、S／D及心房收缩波（Ar）；转换DTI速度模式，测量左室侧壁缘二尖瓣环舒张早期运动峰值速度（Ea）、舒张晚期运动峰值速度（Aa）并计算Ea／Aa。 结果 OMI舒张功能假性正常患者与正常人的年龄和血流频谱E、A、E／A、IRT、D、S／D及二尖瓣环Aa测值比较无显著性差异（P〉0.05），DT缩短和S波降低具有显著性差异（P〈0．05），肺静脉血流Ar较正常人升高，而二尖瓣环Ea及Ea／Aa较比正常人明显减低，具有显著性差异（P〈0．01）。 结论 DTI检测二尖瓣环Ea及Ea／Aa比值可鉴别OMI患者舒张功能假性正常。     

Mitral regurgitation and left ventricular diastolic dysfunction similarly affect mitral and pulmonary vein flow Doppler parameters: the advantage of end-diastolic markers.

Enhanced early mitral flow and reduced systolic pulmonary vein flow may be caused both by increased left ventricular pressure as the result of diastolic dysfunction and by increased transmitral flow as the result of mitral regurgitation. Nevertheless, Doppler parameters are widely used to predict left ventricular filling pressure. We aimed to analyze the interference of mitral regurgitation with Doppler parameters usually used to estimate left ventricular filling pressure and to identify markers independent of mitral regurgitation, which could reliably estimate increased left ventricular filling pressure. Eighty-four patients (age, 62 +/- 9 years; 82% men) had a complete echocardiographic Doppler examination. Transmitral E- and A-wave velocity, E deceleration time and A duration, pulmonary vein systolic and diastolic velocities, and reversal flow duration and maximal and minimal left atrial volumes were measured. The difference between the duration of pulmonary vein and mitral A waves was calculated (A'-A). Mitral regurgitant volume was quantitatively assessed by echocardiography. Left ventricular end-diastolic pressure was measured invasively. Patients had a wide range of left ventricular ejection fraction (14% to 70%), mitral regurgitant volume (0 to 94 mL), and left ventricular end-diastolic pressure (3 to 37 mm Hg). E velocity, E/A, pulmonary vein systolic and diastolic, and systo-diastolic ratios were significantly and independently correlated with both left ventricular end-diastolic pressure and mitral regurgitant volume. A'-A showed a strong correlation with left ventricular end-diastolic pressure (r = 0.70; P <.0001), but the relation with mitral regurgitant volume was not significant (r = 0.19; P =.08). Mitral regurgitation affects the majority of Doppler parameters widely used to predict filling pressure but does not influence Ad'-Ad, which proved to be the strongest predictor of left ventricular end-diastolic pressure.     

Ductus venosus index: a method for evaluating right ventricular preload in the second-trimester fetus.

This study was designed to examine ventricular preload by measuring the ductus venosus index during the second trimester of pregnancy. A total of 137 women were entered into the study. Each fetus was examined with real-time, color and pulsed Doppler ultrasound. The color Doppler maximal velocity setting was adjusted so that the umbilical vein was homogeneous in color, did not demonstrate aliasing, and filled the venous lumen. The pulsed Doppler gate was placed within the ductus venosus in all subjects. Color Doppler identified a turbulent flow velocity within the ductus venosus which was not present in the umbilical vein, hepatic vein or inferior vena cava. The ductus venosus pulsed Doppler waveform demonstrated flow velocity from the umbilical vein to the heart during ventricular systole, the rapid filling phase of ventricular diastole, and atrial systole. However, flow velocity was decreased during atrial systole compared to ventricular systole and the rapid filling phase of diastole. The ductus venosus index was computed from the Doppler waveform of the ductus venosus at points consistent with ventricular and atrial systole ((ventricular systole - atrial systole)/ventricular systole). Regression analysis demonstrated a significant (p = 0.001) relationship between the ductus venosus index and gestational age (ductus venosus index = 75.5757 - 7.25484 x weeks gestation), standard error of the estimate = 7.21959; R = -0.451. One fetus with a hypoplastic left atrium and ventricle demonstrated a normal ductus venosus index. Two fetuses, one with pulmonary atresia and the second with severe cardiovascular dysfunction, demonstrated an abnormal ductus venosus index associated with absent flow velocity during atrial systole. This was associated with notching in the umbilical vein. The ductus venosus index is an angle-independent measurement from which right ventricular preload may be evaluated.     

肺血栓栓塞症的危险度分层和预后评价

目的探讨肺血栓栓塞症（PTE）的危险度分层和预后评价指标。方法回顾性分析2002年1月-2006年12月本院经核素肺通气／灌注扫描或螺旋CT肺动脉造影确诊的46例PTE患者的临床资料。鲮果本组总病死率为33％（15／46例）。肌钙蛋白Ⅰ阳性组（11例）和阴性组（35例）的病死率分别为82％（9／11例）和17％（6／35例）；心电图正常组（14例）和异常组（32例）的病死率分别为7％（1／14例）和44％（14／32例）；超声心动图检查右心室扩张（右心室／左心室舒张内径比率≥0．6）组（20例）和无扩张（右心室／左心室舒张内径比率〈0．6）组（26例）的病死率分别为55％（11／20例）和15％（4／26例）；螺旋CT肺动脉造影测定的肺动脉栓塞指数〈0．60组（19例）和≥0．60组（11例）的病死率分别为5％（1／19例）和91％（10／11例）;以上任何两组间病死率比较差异均有统计学意义（P均〈0．05）。结论肌钙蛋白I、心电图、超声心动图提示的右心室扩张、螺旋CT肺动脉造影测定的肺动脉栓塞指数可作为PTE患者的危险度分层和预后评价指标，有助于选择恰当的治疗方法。     

多普勒组织成像评价小儿心脏移植术后心功能

目的用超声心动图二维、M型、彩色多普勒及脉冲多普勒组织成像(PW-DTI)等方法对小儿心脏移植术后非排异期心脏的结构、形态、血流、功能等状态进行综合评价，重点探讨PW-DTI对小儿心脏移植术后非排异期心功能评价的意义。方法移植组和对照组各36例，应用超声心动图、PW-DTI测量左室舒张末期内径，室间隔厚度，左室后壁厚度，左室质量，左室短轴缩短率，二、三尖瓣前向血流舒张早、晚期峰值速率及心率；将PW-DTI取样容积置于二尖瓣瓣环水平左室侧壁、室间隔及三尖瓣环水平右室壁采样，获取收缩期和舒张早、晚期PW-DTI运动速度曲线。结果移植组的所有PW-DTI速度曲线参数均较对照组低。二尖瓣瓣环水平左室侧壁舒张早期峰值速率，室间隔及三尖瓣环收缩期峰值速率，舒张早、晚期峰值速率与对照组差异有显著性意义；而其他指标移植组与对照组基本相同。结论PW-DTI速度曲线参数的结果提示心脏移植术后非排异期患儿在常用的心功能指标测值正常时，已存在右室收缩、舒张功能及左室舒张功能的减低，以右心功能减低为明显。PW-DTI是一种敏感、简便的测量小儿心脏移植后左、右心功能的方法．     

血流向量成像技术评价室壁瘤患者左心室整体舒张功能

目的 应用血流向量成像(VFM)技术直观检测正常人和心肌梗死并发室壁瘤患者舒张期左心室血流流场的动态变化,定量评价室壁瘤患者左心室整体舒张功能.方法 收集心肌梗死并发心尖室壁瘤患者29例(室壁瘤组)及健康志愿者33例(对照组),应用VFM技术分析等容舒张期、快速充盈期、减慢充盈期、心房收缩期的涡流及流线特征、涡流横径及纵径的比较、舒张早期左心室流入道压力阶差(ΔP),应用组织多普勒测量二尖瓣环舒张早期峰值速度(E′)、舒张晚期峰值速度(A′)及比值(E′/A′).结果 与对照组不同的是整个舒张期室壁瘤组在左心室心尖室壁瘤内均没有检测到涡流及流线信号;心房收缩期和快速充盈期室壁瘤组二尖瓣下涡流横径和纵径显著高于对照组(P<0.05),而在等容舒张期、减慢充盈期两组无显著差异(P>0.05);室壁瘤组舒张早期左心室流入道压力阶差(ΔP)明显低于正常对照组(P<0.05),并与组织多普勒测量的E′/A′呈显著正相关.结论 VFM技术能够直观检测舒张期左心室内血流流场变化,显示室壁瘤组心腔内血流充盈紊乱,同时可定量局部向量速度,从全新的角度证实室壁瘤患者左心室整体舒张功能减低.