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1.
目的 比较TTE与TEE诊断二尖瓣脱垂合并腱索断裂的准确率,评价超声观察二尖瓣脱垂形态在诊断腱索断裂中的价值。方法 选择经手术证实的二尖瓣脱垂患者25例,应用TTE与TEE观察二尖瓣脱垂部位并进行比较,分析二尖瓣脱垂形态及其与腱索断裂的关系。结果 25例二尖瓣脱垂患者中,前叶脱垂10例,后叶脱垂15例。TEE在二尖瓣脱垂部位的分区中比TTE准确。TTE诊断二尖瓣腱索断裂的准确率为53.84%,TEE的诊断准确率为84.62%,TEE明显优于TTE(P<0.05)。伴有腱索断裂的二尖瓣脱垂多表现为倾斜状脱垂(χ2=4.81,P<0.05)。结论 TEE能较TTE更准确地诊断二尖瓣脱垂。应用此两种技术,可根据二尖瓣脱垂形态间接判断是否存在腱索断裂。  相似文献   

2.
目的 探讨二维经胸超声心动图(2D TTE)与实时三维经胸超声心动图(RT3D TTE)评价二尖瓣脱垂(mitral valve prolapse,MVP)的准确性.方法 采集42例MVP患者的2D TTE与RT3D TTE图像,明确瓣膜脱垂区域,与手术结果对照.结果 2D TTE与RT3D TTE评价MVP的准确度、敏感度、特异度分别为92.74%、91.95%、93.20%与96.58% 、96.55%、96.60%.McNemar's检验2种技术的准确度无显著差异.观察者间的一致性Kappa值分别为0.92、0.98 (P<0.05).RT3D TTE评价二尖瓣各区域脱垂的阳性释然比≥9.47,阴性释然比≤0.14.结论 2D TTE与RT3D TTE可以准确评价MVP,2种技术结合应用,为手术方案的制定提供可靠依据.  相似文献   

3.
目的 探讨实时三维经食管超声(RT3D TEE)在二尖瓣反流(MR)Carpentier''s分型中的应用价值。方法 RT3D TEE检查中度及以上MR患者共124例,按照Carpentier''s分型分为Ⅰ~Ⅲ型,并随访手术例数和术式。结果 124例患者中Carpentier''s Ⅰ型9例,其中心房颤动8例,二尖瓣裂1例;Ⅱ型102例,其中单纯二尖瓣脱垂16例,二尖瓣腱索断裂伴脱垂80例,感染性心内膜炎6例;Ⅲ型13例,Ⅲa型风湿心脏病8例,Ⅲb型左心收缩功能减低5例。MR患者接受手术治疗101例,其中二尖瓣成形术83例,瓣膜置换18例。结论 RT3D TEE可对不同类型MR进行精确评价,并对易混淆病变起鉴别作用,可为临床治疗提供客观依据。  相似文献   

4.
目的 评价三维对比增强磁共振血管成像(3D CE-MRA)动脉期及3D CE-MRA双期检查对头颈部动脉狭窄的诊断价值。方法 对51例患者行3D CE-MRA双期检查,分析3D CE-MRA动脉期检查及3D CE-MRA双期检查表现,并与DSA相对照,分析两者对头颈部动脉狭窄的诊断效能。结果 以DSA为金标准,3D CE-MRA动脉期及3D CE-MRA双期诊断头颈部动脉狭窄敏感度、特异度、阳性预测值、阴性预测值、总符合率、阳性似然比、阴性似然比分别为90.81%(168/185)、92.96%(871/937)、71.79%(168/234)、98.09%(871/888)、92.60%(1039/1122)、12.90、0.10和90.81%(168/185)、95.62%(896/937)、80.38%(168/209)、98.14%(896/913)、94.83%(1064/1122)、20.73、0.10。3D CE-MRA动脉期、3D CE-MRA双期检查与DSA诊断结果均具有较高的一致性(Kappa=0.730、0.798)。3D CE-MRA动脉期与3D CE-MRA双期检查的特异度、阳性预测值、总符合率差异有统计学意义(P均<0.05)。结论 3D CE-MRA动脉期及3D CE-MRA双期检查与DSA诊断头颈部动脉狭窄具有较高的一致性;且3D CE-MRA双期较3D CE-MRA动脉期检查诊断准确率更高,尤其对诊断重度以上狭窄更具优势。  相似文献   

5.
目的 应用经食管实时三维超声(RT-3D-TEE)定量分析二尖瓣成形术对瓣环三维结构的影响。方法 将30例二尖瓣脱垂患者根据术前是否伴有左心室增大分为两组,A组为左心室内径正常患者,共10例,B组为左心室内径增大者,共20例。于二尖瓣成形手术前后分别行RT-3D-TEE检查,对比分析两组患者二尖瓣环结构参数变化。结果 ①与二尖瓣成形术前相比,术后A、B两组瓣环面积、周长、前后径均明显减小(P均<0.05),主动脉瓣二尖瓣环夹角与术前比较差异无统计学意义(P>0.05);②B组术后瓣环左右径、高度、高度/左右径比值明显减小(P均<0.05),而A组手术前后差异无统计学意义(P均>0.05);③术后B组瓣环面积、周长、左右径、前后径及高度变化率均明显大于A组(P均<0.05)。结论 二尖瓣成形术后,特别术前伴左心室增大时,瓣环部分三维结构可产生明显改变。  相似文献   

6.
二维斑点追踪技术定量测定左心室容积及整体收缩功能   总被引:2,自引:1,他引:1  
目的 探讨采用二维斑点追踪超声心动图(STE)定量测定左心室容积及左心室整体收缩功能的可行性。 方法 采用STE在心尖四腔切面测定118人左心室舒张末期容积(LVEDV)、左心室收缩末期容积(LVESV)、左心室射血分数(LVEF),并与二维超声心动图(2DE)Simpson双平面法及实时三维超声心动图(RT3DE)测定的LVEDV、LVESV和LVEF进行对比及相关性分析。进行STE测量的重复性分析。 结果 STE测定的LVEDV与2DE差异无统计学意义,低于RT3DE(P<0.05);STE测定的LVESV与RT3DE差异无统计学意义,高于2DE(P<0.05);STE测定的LVEF低于2DE和RT3DE的测定结果(P<0.001)。STE与2DE及RT3DE测定的LVEDV、LVESV、LVEF具有良好相关性(P均<0.001)。STE测定左心室容积的同一观察者和观察者间变异分别为6.94%、8.31%,测定LVEF的同一观察者和观察者间的变异分别为9.12%、9.87%。 结论 STE测定的左心室容积和LVEF与2DE及RT3DE的测定值具有良好的相关性及重复性;STE可用于评价左心室容积及整体收缩功能。  相似文献   

7.
目的 探讨实时三维经食管超声心动图(RT-3D-TEE)诊断二尖瓣乳头肌断裂(PMR)的临床价值。方法 回顾性分析35例疑诊二尖瓣PMR患者,术前以经胸超声心动图(TTE)及RT-3D-TEE观察二尖瓣病变情况及是否合并PMR。以手术结果为金标准,计算术前RT-3D-TEE和TTE诊断二尖瓣PMR的效能。结果 35例中,25例术中证实为二尖瓣PMR,包括前外侧PMR 2例,后内侧PMR 23例;完全型PMR 1例,部分型PMR 24例。10例为非二尖瓣PMR。对23例行二尖瓣位人工瓣膜置换术,2例行二尖瓣成形术。术前RT-3D-TEE诊断二尖瓣PMR 23例,TTE诊断PMR 20例,RT-3D-TEE诊断二尖瓣PMR符合率[92.00%(23/25)]高于TTE[80.00%(20/25),P=0.033]。RT-3D-TEE诊断PMR的敏感度、特异度、准确率、阳性预测值、阴性预测值和约登指数分别为92.00%(23/25)、100%(10/10)、94.29%(33/35)、100%(23/23)、83.33%(10/12)和0.92;术前TTE诊断二尖瓣PMR的敏感度、特异度、准确率、阳性预测值、阴性预测值及约登指数分别为80.00%(20/25)、90.00%(9/10)、82.86%(29/35)、95.24%(20/21)、64.29%(9/14)及0.70。结论 RT-3D-TEE可从不同角度和层面准确提供二尖瓣解剖及病理改变的超声特征,是确诊二尖瓣PMR的有效方法,可为术前诊断、术中监测及术后评估提供可靠信息。  相似文献   

8.
目的 评价高分辨磁共振成像(HR-MRI)对直肠癌术前TN分期的应用价值。方法 分析61例经手术病理证实的直肠癌患者的术前资料,由两名高年资影像医师协商阅片,并与最终手术病理结果对照。应用SPSS13.0软件对所得数据进行一致性检验。结果 HR-MRI用于直肠癌术前TN分期时,与病理T分期结果一致性好(Kappa=0.900,P<0.01)、与病理N分期结果的一致性较好(Kappa=0.716,P<0.01),HR-MRI对T分期的准确率为96.72%(59/61),N分期准确率为83.78%(51/61)。结论 HR-MRI可用于对直肠癌术前TN分期的评估。  相似文献   

9.
非对比增强四维MR血管成像评价脑动静脉畸形   总被引:1,自引:0,他引:1  
目的 评价非对比增强四维MRA(NCE 4D MRA)在评价脑动静脉畸形(AVM)中的价值。 方法 收集15例临床确诊且未经治疗的脑AVM患者,分别行NCE 4D MRA和DSA检查;观察AVM的供血动脉、畸形血管团大小及引流静脉,对比二者的诊断结果,并进行Kappa一致性检验。 结果 DSA检查时所见的15例共15个AVM病灶NCE 4D MRA均可显示。DSA和MRA显示AVM供血动脉的一致性好(Kappa=0.92, P<0.001),判断畸形血管团大小的一致性较好(Kappa=0.69,P<0.001),显示引流静脉的一致性中等(Kappa=0.50,P<0.001)。 结论 NCE 4D MRA能无创评价脑AVM的血管结构及血流动力学信息,具有潜在应用价值,但对引流静脉的显示效果有待改善。  相似文献   

10.
目的 应用实时三维经食管超声心动图(RT3D-TEE)评价非瓣膜性心房颤动(AF)患者左心耳(LAA)形态及功能.方法 通过经胸超声心动图及RT3D-TEE采集图像,对29例心房颤动患者(AF组)和12例无器质性心脏疾病受试者(对照组)的LAA形态和功能进行比较.结果 AF组LAA口短径及左心耳舒张末期容积(LAA-EDV)测值显著高于对照组(P=0.01、0.02);AF组LAA的峰值血流排空速度,LAA口离心率和LAA射血分数均显著低于对照组(P=0.01、0.01、0.02).结论 与对照组相比,AF组LAA形态和功能有明显差异;应用RT3D-TEE对LAA进行形态和功能研究是可行的.  相似文献   

11.
目的 采用三维经食管超声心动图评估感染性心内膜炎栓塞及住院死亡的超声特征。方法 回顾性收集124例自体瓣膜感染性心内膜炎患者,分析其经胸二维超声、多平面和三维经食管超声特征。将手术前或后1个月内栓塞和死亡作为主要终点事件。将大赘生物、脓肿或瘘、腱索断裂、中重度瓣膜反流和瓣膜穿孔或严重瓣膜破坏各计1分,进行简单积分,对心脏受损累计简单积分、赘生物大小、瓣膜受损严重并失去正常形态结构采用Hosmer和ROC曲线下面积评估栓塞和不良事件。结果 124例患者中,27例(27/124,21.77%)患者发生栓塞。与二维经胸超声心动图比较,多平面和三维经食管超声心动图可识别赘生物的确切位置及其长度,而二维经胸超声心动图漏诊左心房和乳头肌赘生物。栓塞及不良事件患者血红蛋白显著低于非栓塞及不良事件患者(P<0.05)。栓塞及不良事件患者多部位赘生物形成、赘生物活动度和瓣膜严重受损并失去正常形态构成比均高于非栓塞及不良事件患者(P均<0.05)。感染性心内膜炎心脏受损累计简单积分、赘生物大小、瓣膜严重受损并失去正常形态结构曲线下面积分别为0.65(P=0.06)、0.60(P=0.19)、0.70(P=0.03)。结论 多平面及三维经食管超声对感染性心内膜炎,尤其位于不常见位置的赘生物诊断起重要作用。瓣膜严重受损并失去正常形态者与栓塞及不良事件有关。  相似文献   

12.

Purpose

To evaluate the diagnostic accuracy of MR enteroclysis and to compare it to video capsule endoscopy (VCE) in the analysis of suspected small-bowel disease.

Methods

We performed a retrospective analysis of 77 patients who underwent both MR enteroclysis and VCE and compared the findings of these studies with the findings of enteroscopy, surgery, or with the results of clinical follow-up lasting ≥2 years.

Results

Findings included malignant neoplasms (n = 13), benign neoplasms (n = 10), refractory celiac disease (n = 4), Crohn’s disease (n = 2) and miscellaneous conditions (n = 10). Specificity of MR enteroclysis was higher than that of VCE (0.97 vs. 0.84, P = 0.047), whereas sensitivity was similar (0.79 vs. 0.74, P = 0.591). In 2/32 (6.3%) patients with both negative VCE and negative MR enteroclysis a positive diagnosis was established, compared to 5/11 (45.5%) patients in whom VCE was positive and MR enteroclysis was negative (likelihood ratio 8.1; P = 0.004), 9/11 (81.8%) patients in whom MR enteroclysis was positive and VCE was negative (likelihood ratio 23.5; P < 0.0001), and all 23 patients in whom both VCE and MR enteroclysis showed abnormalities (likelihood ratio 60.8; P < 0.0001).

Conclusions

VCE and MR enteroclysis are complementary modalities. In our study-population, MR enteroclysis was more specific than VCE, while both produced the same sensitivity.  相似文献   

13.
ObjectivesTo examine the sensitivity of contemporary transthoracic echocardiography (TTE) for the detection of vegetation, abscess cavity, or prosthetic valve dehiscence (Vg) in patients with suspected infective endocarditis (IE) and to identify whether a relatively normal initial TTE finding can be effectively used as a rule out test, obviating the need for transesophageal echocardiography (TEE).Patients and MethodsWe evaluated clinical, microbiological, and echocardiographic data for all patients with suspected IE referred for both TTE and TEE between January 1, 2005, and December 31, 2010. Patients were stratified into 3 groups by baseline TTE findings: negative TTE (native valves with less than or equal to mild regurgitation and no Vg), equivocal TTE (no Vg but prosthetic valve or greater than mild native valvular regurgitation), and positive TTE (Vg detected).ResultsWe studied 622 consecutive patients (68% male; mean ± SD age, 62±17 years), including 256 with Staphylococcus aureus bacteremia (SAB). The presence of Vg was confirmed by TEE in 141 patients (23%). The TTE had low sensitivity for the detection of Vg (58%). A total of 271 patients (44%) had an initial negative TTE. Of these, TEE demonstrated Vg in only 8 patients (negative predictive value [NPV] of negative TTE, 97%). The negative TTE group included 132 patients with SAB, only 6 of whom had Vg (NPV, 95%). Of 265 patients with equivocal TTE, Vg was demonstrated in 51 (19%).ConclusionIn a hospital population with clinically suspected IE, TTE had low sensitivity for the detection of Vg; however, a negative initial TTE was a common finding, with a high NPV, even in the setting of SAB. A TEE may be avoided in many patients with suspected IE.  相似文献   

14.
目的 对比观察经颅多普勒(TCD)发泡试验、经胸超声心动图(TTE)右心造影及颈胸联合超声造影诊断卵圆孔未闭(PFO)右向左分流(RLS)的价值。方法 对39例PFO-RLS患者先后行TCD发泡试验、TTE右心造影、颈胸联合超声造影和经食管超声心动图(TEE)检查,以TEE为金标准,观察前三者诊断PFO-RLS的能力。结果 TTE右心造影和颈胸联合超声造影诊断PFO-RLS的特异度均为100%,TTE右心造影的敏感度(53.49%)及准确率(54.85%)均低于TCD发泡试验(敏感度93.02%,准确率95.35%)和颈胸联合超声造影(敏感度90.69%,准确率95.23%)(P均<0.05);TCD发泡试验与颈胸联合超声造影的诊断敏感度、准确率及检出不同分流量PFO-RLS能力差异均无统计学意义(P均>0.05),且诊断一致性极高(Kappa=0.852)。TCD发泡试验和颈胸联合超声造影检出少量PFO-RLS的能力均高于TTE右心造影(P均<0.05),与后二者诊断结果的一致性分别为中等和一般(Kappa=0.429、0.311)。结论 TCD发泡试验诊断PFO-RLS敏感度和准确率较高,但难以判断RLS位置;TTE右心造影诊断PFO-RLS特异度极高,但敏感度和准确率欠佳,尤其对少量PFO-RLS;颈胸联合超声造影有较高诊断特异度、敏感度和准确率,可检出少量PFO-RLS,并有助于判断RLS位置。  相似文献   

15.
经胸实时三维超声心动图在室间隔缺损诊断中的应用价值   总被引:3,自引:0,他引:3  
目的:探讨实时三维超声心动图在室间隔缺损诊断中的临床应用价值。方法:应用实时三维超声诊断仪获取28例先天性室间隔缺损患者的三维数据库,并利用三维数据工作站对缺损大小进行测量分析,其中18例患者的三维测量值与二维超声及手术结果对照。结果:实时三维成像能从多个视角、甚至模拟手术路径立体显示室间隔缺损的全貌,包括缺损的整体形态、部位、大小以及毗邻关系;同二维超声所测直径相比,三维超声所测室缺最大长轴径与手术结果具有更好的相关性(r=0.92 vs r=0.84)。结论:与二维超声心动图比较,实时三维超声心动图反映了室间隔缺损的立体空间结构,可对缺损大小进行准确的定量分析;与以往三维重建超声相比,实时三维超声可迅速得到室间隔缺损的三维图像,具有重要的临床应用潜力。  相似文献   

16.
目的 观察经胸超声心动图(TTE)和三维经食管超声心动图(3D-TEE)诊断二叶主动脉瓣(BAV)合并感染性心内膜炎(IE)的价值。方法 回顾性分析53例BAV合并IE患者的超声图像,超声表现包括赘生物、瓣膜穿孔、脓肿和瘘道。以外科手术所见作为金标准,评估TTE和3D-TEE的超声特征及其诊断价值。结果 3D-TEE检出赘生物、瓣膜穿孔、脓肿和瘘道的敏感度(100% vs.90.20%,96.87% vs.90.62%,92.86% vs.67.86%,94.12% vs.70.59%)和阳性预测值均高于TTE(100% vs.95.83%,100% vs.93.55%,96.30% vs.86.36%,100% vs.85.71%,P均<0.05)。结论 超声心动图对于BAV合并IE的总体检出率高。3D-TEE的可视性和空间分辨率比TTE更好,诊断BAV合并IE敏感度和阳性预测值更高。  相似文献   

17.

Objectives

Despite the low diagnostic yield of echocardiogra0, it is often used in the evaluation of syncope. This study determined whether patients without abnormalities in the initial evaluation benefit from transthoracic echocardiogram (TTE) and the clinical factors predicting an abnormal TTE.

Methods

This study enrolled 241 patients presenting to the emergency department with syncope. The TTE results were analyzed based on risk factors suggesting cardiogenic syncope in the initial evaluation.

Results

Of the 115 patients with at least one risk factor, 97 underwent TTE and 27 (27.8%) had TTE abnormalities. In comparison, of the 126 patients without risk factors, 47 underwent TTE and only 1 (2.1%) had TTE abnormalities. Significantly different factors between patients with normal and abnormal TTE findings were entered in a multiple logistic regression analysis, which yielded age [adjusted odds ratio (aOR), 1.09; 95% CI, 1.02–1.15; p = 0.006], an abnormal electrocardiogram (ECG) (aOR, 7.44; 95% CI, 1.77–31.26; p = 0.010), and a brain natriuretic peptide (BNP) level of > 100 pg/mL (aOR, 2.64; 95% CI, 1.21–5.73; p = 0.011) as independent predictors of TTE abnormalities. The cutoff value of age predicting an abnormal TTE was 59.0 years (area under the curve, 0.777; p < 0.001).

Conclusion

A patient who is older than 59 years or has an abnormal ECG or an elevated BNP level may benefit from TTE. Otherwise, TTE should be deferred in patients with no risk factors in the initial evaluation.  相似文献   

18.
BackgroundPatient-specific models promises to support the surgical decision-making process, particularly in adolescent idiopathic scoliosis. The present computational biomechanical study investigates how specific instrumentation parameters impact 3D deformity correction in thoracic scoliosis.Methods1080 instrumentation simulations of a representative patient were run. The independent instrumentation parameters were: screw pattern, upper and lower instrumented vertebrae, rod curvature and rod stiffness. ANOVA and correlation analyses analyzed how the instrumentation parameters influenced the 3D correction.FindingsCoronal plane correction was affected by the lower instrumented vertebra and rod stiffness (explaining 84% and 11%, respectively, of its overall variance). The sagittal profile was controlled by rod curvature and the upper vertebra (56% and 36%). The transverse plane vertebral rotation was influenced by lower, upper instrumented vertebra and screw pattern (35%, 32% and 19%). The Cobb angle correction was strongly correlated with the number of fused vertebrae, particularly when grouped by the upper instrumented vertebra (r = −0.91) and rod stiffness (r = −0.73). Thoracic kyphosis was strongly correlated with the number of fused vertebrae grouped by rod curvature (r = 0.84). Apical vertebral rotation was moderately correlated with the number of fused vertebrae grouped by upper/lower instrumented vertebra (r = 0.55/0.58), although variations were minimal.InterpretationInstrumenting the last vertebra touching the central sacral vertical line improves 3D correction. A trade-off between a more cranial vs. caudal upper instrumented vertebra, respectively beneficial for coronal/sagittal vs. transverse plane correction, is required. High rod stiffness, differential rod contouring, and screw pattern were effective for coronal correction, thoracic kyphosis, and axial vertebral derotation, respectively.  相似文献   

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