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Speckle Tracking of Common Carotid Artery: A New Method for the Evaluation of Mechanical Vascular Function of Atherosclerosis 颈总动脉斑点追踪:一种评估动脉粥样硬化血管机械功能的新方法
Pub Date : 2016-09-01 DOI: 10.4250/JCU.2016.24.3.195
Jin-Oh Choi
As cardiovascular death remains major cause of death worldwide, there are growing needs for risk evaluation for cardiovascular event. Arterial stiffness, which refers to the rigidity of arterial wall, increases in the elderly person as well as patients with atherosclerotic disease. Based on the belief that increased vascular stiffness precedes atherosclerotic vascular event, there were attempt to measure vascular stiffness. In this regard, carotid-femoral pulse wave velocity (PWV) using tonometry has been proven to be simple, noninvasive measurement of vascular stiffness, as it is inversely related with vascular compliance. Stiff and rigid vessel would transfer pulse wave faster and PWV be higher. On the other hands, carotid intima-media thickness (CIMT) using ultrasound is well correlated with cardiovascular risk and is commonly used as surrogate marker of systemic atherosclerosis. Current advance in automated imaging analysis made it much easier to obtain CIMT in daily clinic and reproducibility of the measurement got even better. Another approach to obtain information about vascular stiffness was ultrasound-based measurement of regional mechanical properties of arterial wall. This method includes the measurement of changes in the dimension of an artery generated by each pulse pressure. From the pressure and diameter measurement, variables regarding vascular stiffness such as distensibility, compliance, elastic modulus index and beta stiffness index can be calculated. More recently, technical advance in speckle tracking method, which originally used for the measurement of ventricular pISSN 1975-4612/ eISSN 2005-9655 Copyright © 2016 Korean Society of Echocardiography www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.195
由于心血管死亡仍然是世界范围内的主要死亡原因,因此对心血管事件风险评估的需求日益增长。动脉硬度是指动脉壁的硬度,在老年人和动脉粥样硬化疾病患者中增加。基于血管硬度增加先于动脉粥样硬化的观点,人们尝试测量血管硬度。在这方面,使用血压计的颈动脉-股动脉脉搏波速度(PWV)已被证明是血管刚度的简单、无创测量,因为它与血管顺应性呈负相关。刚性容器传递脉冲波的速度更快,PWV更高。另一方面,超声检查颈动脉内膜-中膜厚度(CIMT)与心血管风险有很好的相关性,常被用作系统性动脉粥样硬化的替代指标。目前自动成像分析技术的进步使得在日常临床中获得CIMT变得更加容易,测量结果的重现性也更好。另一种获取血管刚度信息的方法是基于超声测量动脉壁的区域力学特性。这种方法包括测量由每次脉压产生的动脉尺寸变化。通过压力和管径的测量,可以计算出血管的膨胀系数、柔度、弹性模量指数和β刚度指数等与血管刚度相关的变量。最近,斑点跟踪方法的技术进步,最初用于测量心室pISSN 1975-4612/ eISSN 2005-9655版权©2016韩国超声心动图学会www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.195
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引用次数: 1
Echocardiographic Evaluation of the Right Heart 右心超声心动图评价
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.183
R. Markley, Asghar Ali, Jonathan Potfay, W. Paulsen, I. Jovin
The appropriate use of echocardiography may reduce the need for invasive diagnostic cardiac procedures. The right side of the heart has recently gained interest among cardiologists as it became clear that abnormalities of the right heart morphology and function are associated with increased morbidity and mortality. Echocardiography is easy to perform, relatively cheap, readily available and do not pose the risk of ionizing radiation. Conventional 2D and, more recently, 3D echocardiography provides pertinent anatomic and physiologic information about the right side of the heart. Because of the advantages and simplicity of echocardiography it continues to be an excellent tool for evaluating the structure and function of the right side of the heart. This review outlines the uses of echocardiography in evaluating the right heart structure and function.
适当使用超声心动图可以减少对侵入性心脏诊断程序的需要。心脏右侧最近引起了心脏病学家的兴趣,因为很明显,右心形态和功能的异常与发病率和死亡率的增加有关。超声心动图易于操作,相对便宜,容易获得,并且不会造成电离辐射的危险。传统的二维超声心动图和最近的三维超声心动图提供了有关心脏右侧的相关解剖和生理信息。由于超声心动图的优点和简单性,它仍然是评估心脏右侧结构和功能的极好工具。本文综述了超声心动图在评价右心结构和功能方面的应用。
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引用次数: 21
Double-Orifice Tricuspid Valve Visualized by Three-Dimensional Transthoracic Echocardiography 三维经胸超声心动图显示双孔三尖瓣
Pub Date : 2016-09-01 DOI: 10.4250/JCU.2016.24.3.253
K. Obase, K. Addetia, Kazue Takahashi, Katsunori Yamamoto, Ai Kawamura, Tomoko Tamada, Koichiro Imai, S. Uemura
A 75-year-old man with atrial fibrillation was hospitalized because of shortness of breath triggered by upper respiratory infection and tachycardia. His symptoms were improved by bed rest and administration of diuretics. Pretreatment echocardiogram reported dilatation of the right ventricle (RV). Follow-up study was performed before discharge. Apical four-chamber view still demonstrated remarkable dilatation of RV (Fig. 1A). In one of the apical four-chamber views, the tricuspid valve showed a bridge-like appearance in systole without valve opening (Fig. 1B and C, Supplementary movie 1). The RV inflow view (Fig. 1D, E, and F, Supplementary movie 2) revealed localized small leaflet defect at posterior septum (Fig. 1D) with the opposing leaflet tip coapting against the RV wall (Fig. 1D). At the anterior side of the "bridge", another valve orifice was observed in RV inflow view as well as parasternal short-axis views (Fig. 1G, H, and I, Supplementary movie 3). Color Doppler images in these views showed flow from the RV to right atrium across two orifices (Fig. 1F and I), suggesting double-orifice tricuspid valve.1),2) There was no pressure gradient across both orifices in diastole. Tricuspid regurgitation jet velocity of less than 3 m/s was observed from both orifices in systole. Three-dimensional transthoracic echocardiography clearly visualized double orifices (Fig. 2, Supplementary movie 4) and confirmed the diagnosis.
一位75岁的房颤患者因上呼吸道感染和心动过速引起呼吸短促而住院。他的症状在卧床休息和服用利尿剂后得到改善。预处理超声心动图显示右心室(RV)扩张。出院前进行随访研究。顶端四腔镜仍显示右心室明显扩张(图1A)。在其中一个顶端四室视图中,三尖瓣在收缩期呈桥状外观,没有瓣膜打开(图1B和C,补充片1)。右心室流入视图(图1D, E和F,补充片2)显示后隔膜局部小小叶缺损(图1D),相反的小叶尖端覆盖在右心室壁上(图1D)。在“桥”的前部,在右心室流入视图和胸骨旁短轴视图中观察到另一个瓣膜孔(图1G、H和I,补充片3)。这些视图中的彩色多普勒图像显示从右心室流向右心房的血流经过两个孔(图1F和I),提示双孔三尖瓣(1),2)舒张期两个孔没有压力梯度。收缩期两孔三尖瓣反流射流速度均小于3 m/s。三维经胸超声心动图清晰显示双孔(图2,补充片4),确诊。
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引用次数: 1
Diastolic Dyssynchrony in Acute ST Segment Elevation Myocardial Infarction and Relationship with Functional Recovery of Left Ventricle 急性ST段抬高型心肌梗死舒张非同步化与左心室功能恢复的关系
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.208
B. Turan, T. Daşlı, A. Erkol, I. Erden, Y. Basaran
Background Incidence of diastolic dyssynchrony (DD) and its impact on functional recovery of left ventricle (LV) after ST segment elevation myocardial infarction (STEMI) is not known. Methods Consecutive patients with STEMI who underwent successful revascularization were prospectively enrolled. Echocardiography with tissue Doppler imaging was performed within 48 hours of admission and at 6 months. LV end-diastolic volume index (EDVI), end-systolic volume index (ESVI), ejection fraction (EF), and left atrial volume index (LAVI) were calculated. Diastolic delay was calculated from onset of QRS complex to peak of E wave in tissue Doppler image and presented as maximal temporal difference between peak early diastolic velocity of 6 basal segments of LV (TeDiff). Study patients were compared with demographically matched control group. Results Forty eight consecutive patients (55 ± 10 years, 88% male) and 24 controls (56 ± 6 years, 88% male) were included. TeDiff was higher in STEMI than in controls (35.9 ± 19.9 ms vs. 26.3 ± 6.8 ms, p = 0.025). Presence of DD was higher in STEMI than controls (58% vs. 33%, p = 0.046) according to calculated cut-off value (≥ 29 ms). There was no correlation between TeDiff and change in EDVI, ESVI, and LAVI at 6 months, however TeDiff and change in EF at 6 months was positively correlated (r = 0.328, p = 0.023). Patients with baseline DD experienced remodeling less frequently compared to patients without baseline DD (11% vs. 38%, p = 0.040) during follow-up. Conclusion STEMI disrupts diastolic synchronicity of LV. However, DD during acute phase of STEMI is associated with better recovery of LV thereafter. This suggests that DD is associated with peri-infarct stunned myocardium that is salvaged with primary intervention as well as infarct size.
ST段抬高型心肌梗死(STEMI)后舒张不同步(DD)的发生率及其对左心室(LV)功能恢复的影响尚不清楚。方法前瞻性纳入连续成功行血管重建术的STEMI患者。入院48小时内和6个月时进行超声心动图和组织多普勒成像。计算左室舒张末期容积指数(EDVI)、收缩末期容积指数(ESVI)、射血分数(EF)、左房容积指数(LAVI)。从QRS复音开始到组织多普勒图像E波峰值计算舒张延迟,并表示为左室6个基底段早期舒张速度峰值的最大时间差(TeDiff)。研究患者与人口统计学匹配的对照组进行比较。结果纳入48例患者(55±10岁,88%男性)和24例对照组(56±6岁,88%男性)。STEMI患者的TeDiff高于对照组(35.9±19.9 ms vs. 26.3±6.8 ms, p = 0.025)。根据计算的临界值(≥29 ms), STEMI患者的DD发生率高于对照组(58% vs. 33%, p = 0.046)。TeDiff与6个月时EDVI、ESVI、LAVI的变化无相关性,而TeDiff与6个月时EF的变化呈正相关(r = 0.328, p = 0.023)。在随访期间,基线DD患者的重塑频率低于无基线DD患者(11% vs 38%, p = 0.040)。结论STEMI破坏左室舒张同步性。然而,STEMI急性期的DD与其后较好的左室恢复相关。这表明,DD与通过初级干预挽救的梗死周围休克心肌以及梗死面积有关。
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引用次数: 6
Well-Tolerated and Undiscovered Common Atrium until Late Adulthood 直到成年晚期,良好耐受和未被发现的普通心房
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.243
K. Kim, J. Choi, Y. Doo, Y. Yun, Jongwook Kim, Jae Beom Lee
Common atrium is a rare congenital heart disease characterized by complete absence of the interatrial septum, and is commonly accompanied by malformation of the atrioventricular valve. Most patients with common atrium experience symptoms during childhood. Here, we describe a patient with common atrium who experienced his first obvious symptom at 48 years of age.
普通心房是一种罕见的先天性心脏病,以房间隔完全缺失为特征,常伴有房室瓣膜畸形。大多数普通心房的患者在儿童期出现症状。在这里,我们描述了一个患有普通心房的患者,他在48岁时出现了第一次明显的症状。
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引用次数: 4
Findings of Cardiac Magnetic Resonance Imaging in Hypertrophic Cardiomyopathy after 16 Years 肥厚性心肌病16年后心脏磁共振成像的发现
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.239
Gee-Hee Kim, Chul-Min Kim, Bo-Hyun Jang, Hyeong-Han Lee, S. Hong, Sang-hoon Eum, Howook Jeon, D. Moon
A 58-year-old man had been diagnosed with non-obstructive hypertrophic cardiomyopathy (HCMP) according to echocardiography findings 16 years ago. Echocardiography showed ischemic cardiomyopathy (CMP)-like features with decreased systolic function but a non-dilated chamber. Coronary angiography was performed but showed a normal coronary artery. Cardiac magnetic resonance imaging (MRI) revealed multifocal transmural and subepicardial delayed-enhancing areas at the anteroseptal, septal, and inferoseptal left ventricular (LV) wall, and wall thinning and decreased motion of the anteroseptal LV wall. Findings of ischemic CMP-like features by echocardiography suggested microvascular dysfunction. This late stage of HCMP carries a high risk of sudden death. Cardiac MRI evaluation may be necessary in cases of ischemic CMP-like features in HCMP. In this case, the diagnosis of end-stage HCMP with microvascular dysfunction was confirmed by using cardiac MRI after a follow-up period of more than 16 years.
16年前,一名58岁的男性被诊断为非阻塞性肥厚性心肌病(HCMP)。超声心动图显示缺血性心肌病(CMP)样特征,收缩功能下降,但心室未扩张。冠状动脉造影显示冠状动脉正常。心脏磁共振成像(MRI)显示在室间隔前、室间隔和室间隔内左室壁有多灶经壁和心外膜下延迟增强区,左室壁变薄,室间隔前左室壁运动减弱。超声心动图显示缺血性cmp样特征提示微血管功能障碍。晚期HCMP有猝死的高风险。心脏MRI评估可能是必要的缺血性cmp的HCMP样特征的情况下。在这个病例中,经过超过16年的随访,通过心脏MRI确诊终末期HCMP伴微血管功能障碍。
{"title":"Findings of Cardiac Magnetic Resonance Imaging in Hypertrophic Cardiomyopathy after 16 Years","authors":"Gee-Hee Kim, Chul-Min Kim, Bo-Hyun Jang, Hyeong-Han Lee, S. Hong, Sang-hoon Eum, Howook Jeon, D. Moon","doi":"10.4250/jcu.2016.24.3.239","DOIUrl":"https://doi.org/10.4250/jcu.2016.24.3.239","url":null,"abstract":"A 58-year-old man had been diagnosed with non-obstructive hypertrophic cardiomyopathy (HCMP) according to echocardiography findings 16 years ago. Echocardiography showed ischemic cardiomyopathy (CMP)-like features with decreased systolic function but a non-dilated chamber. Coronary angiography was performed but showed a normal coronary artery. Cardiac magnetic resonance imaging (MRI) revealed multifocal transmural and subepicardial delayed-enhancing areas at the anteroseptal, septal, and inferoseptal left ventricular (LV) wall, and wall thinning and decreased motion of the anteroseptal LV wall. Findings of ischemic CMP-like features by echocardiography suggested microvascular dysfunction. This late stage of HCMP carries a high risk of sudden death. Cardiac MRI evaluation may be necessary in cases of ischemic CMP-like features in HCMP. In this case, the diagnosis of end-stage HCMP with microvascular dysfunction was confirmed by using cardiac MRI after a follow-up period of more than 16 years.","PeriodicalId":88913,"journal":{"name":"Journal of cardiovascular ultrasound","volume":"33 1","pages":"239 - 242"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73996251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Role of Index of Valvular-Arterial Impedance and Systemic Arterial Compliance after Aortic Valve Replacement 主动脉瓣置换术后瓣膜-动脉阻抗指数和全身动脉顺应性的作用
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.191
Sung-Ji Park
Mechanical valvular obstruction and reduced arterial compliance combine to increase left ventricular afterload in patinets with aortic stenosis (AS). As a result of the recognition that valvular and arterial abnormalities both play important roles in determining the overall impedance to left ventricular ejection in AS, it is now clear that standard methods of quantifying valvular stenosis, which focus entirely on the valve itself do not adequately characterize the severity, predict the onset, progression, and magnitude of symptoms, or identify the incidence of subsequent adverse event. The valvuloarterial impedance (Zva) provides an estimate of the global left ventricle (LV) hemodynamic load that results from the summation of the valvular and vascular loads, and the concept is very useful because it incorporates stenosis severity, volume flow rate, body size, and systemic vascular resistance. Moreover, Zva can easily be calculated using Doppler echocardiography from 3 simple measurements, that is, the systemic arterial compliance (SAC) in the LV outflow tract, the transvalvular mean gradient, and systolic arterial pressure, it is superior to the standard indexes of AS severity in predicting LV dysfunction. Zva is the best-suited and most relevant parameter to clinically quantify this “global or total” increase in LV hemodynamic load. There is few data regarding effects of surgical aortic valve replacement (AVR) on Zva and SAC. In patients with AS undergoing transcatheter aortic valve implantation (TAVI), acute declines in Zva were reported. Reductions in Zva observed 1 month after TAVI also were shown to persist during a 2-year follow-up, suggesting that pISSN 1975-4612/ eISSN 2005-9655 Copyright © 2016 Korean Society of Echocardiography www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.191
主动脉狭窄(AS)患者的机械瓣膜梗阻和动脉顺应性降低共同增加左心室后负荷。由于认识到瓣膜和动脉异常在确定As左心室射血总阻抗中都起着重要作用,现在很清楚,完全关注瓣膜本身的量化瓣膜狭窄的标准方法不能充分表征严重程度,预测症状的发生、进展和程度,也不能确定随后不良事件的发生率。瓣膜动脉阻抗(Zva)通过瓣膜和血管负荷的总和来估计左心室(LV)的整体血流动力学负荷,这个概念非常有用,因为它结合了狭窄的严重程度、容积流率、体型和全身血管阻力。此外,多普勒超声心动图可以通过3个简单的测量,即左室流出道的全身动脉依从性(SAC)、经瓣平均梯度和收缩压,轻松计算出Zva,在预测左室功能障碍方面优于AS严重程度的标准指标。Zva是临床上量化左室血流动力学负荷“整体或全部”增加的最合适和最相关的参数。关于主动脉瓣置换术(AVR)对Zva和SAC影响的资料很少。在接受经导管主动脉瓣植入术(TAVI)的AS患者中,Zva有急性下降的报道。TAVI后1个月观察到的Zva降低在2年随访期间也持续存在,表明pISSN 1975-4612/ eISSN 2005-9655版权©2016 Korean Society of Echocardiography www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.191
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引用次数: 1
Clinical Implication of Torsion and Strain Using 2D Speckle Tracking Echocardiagraphy in Congenital and Pediatric Population 利用二维散斑跟踪超声心动图检测先天性和儿童扭转和应变的临床意义
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.197
S. Kim
Due to advance of pediatric cardiac surgery during past several centuries, survival started to increase with currently a survival rate into adulthood of many patients born with a congenital heart defect (CHD). Although long-term survival seems promising, follow-up is still complicated in corrected CHD patients characterized by a varying degree of impairment of ventricular performance. Furthermore it is not enough and sometime impossible to evaluate the ventricular function with conventional method in the patients with various morphologic ventricles in these patients. Torsion provides new insight into both systolic and diastolic function compared with conventional methods. Although left ventricular (LV) torsion and strain are important components of LV function in adult population, there are few studies in children and adolescents. In this issue of the Journal, Kim et al., their study using speckle-tracking echocardiography demonstrated the rotation and torsion data in normal children between 2–16 years of the age. They also tried to compare the difference of rotation and torsion between the preschool group and the school group by dividing the patients according to age. As authors mentioned, they could not achieve meaningful difference between two age groups or powerful normal data because of small sample size. However this investigation itself seems to be meaningful attempt in congenital and pediatric cardiologic field. In adult population, there is clear left ventricle twist because of opposite rotational motional motion of base and apex, whereas in children both segments rotate in the same direction but for different amounts and with a longer deformational depISSN 1975-4612/ eISSN 2005-9655 Copyright © 2016 Korean Society of Echocardiography www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.197
在过去的几个世纪里,由于儿童心脏手术的进步,存活率开始提高,目前许多先天性心脏缺陷(CHD)患者的成年存活率。虽然长期生存似乎很有希望,但以不同程度心室功能损害为特征的矫正型冠心病患者的随访仍然很复杂。此外,对于这些脑室形态各异的患者,用常规方法评价脑室功能是不够的,有时甚至是不可能的。与传统方法相比,扭转提供了对收缩和舒张功能的新见解。虽然左室扭转和左室应变是成人左室功能的重要组成部分,但对儿童和青少年的研究很少。在这一期的Journal中,Kim等人使用斑点跟踪超声心动图展示了2-16岁正常儿童的旋转和扭转数据。他们还试图通过将患者按年龄分组,比较学龄前组和学龄组之间旋转和扭转的差异。正如作者所提到的,由于样本量小,他们无法获得两个年龄组之间有意义的差异或强有力的正常数据。然而,这项研究本身似乎是先天性和儿科心脏病学领域有意义的尝试。在成年人中,由于基底和心尖相反的旋转运动,有明显的左心室扭转,而在儿童中,两个节段旋转方向相同,但量不同,变形凹陷时间更长。Copyright©2016 Korean Society of Echocardiography www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.197
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引用次数: 1
Myocardial Rotation and Torsion in Child Growth 儿童生长过程中的心肌旋转和扭转
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.223
Chang Sin Kim, Sora Park, L. Eun
Background The speckle tracking echocardiography can benefit to assess the regional myocardial deformations. Although, previous reports suggested no significant change in left ventricular (LV) torsion with aging, there are certain differences in LV rotation at the base and apex. The purpose of this study was to evaluate the change and relationship of LV rotation for torsion with aging in children. Methods Forty healthy children were recruited and divided into two groups of twenty based on whether the children were preschool-age (2–6 years of age) or school-age (7–12 years of age). After obtaining conventional echocardiographic data, apical and basal short axis rotation were assessed with speckle tracking echocardiography. LV rotation in the basal and apical short axis planes was determined using six myocardial segments along the central axis. Results Apical and basal LV rotation did not show the statistical difference with increased age between preschool- and school-age children. Apical radial strain showed significant higher values in preschool-age children, especially at the anterior (52.8 ± 17.4% vs. 34.7 ± 23.2%, p < 0.02), lateral (55.8 ± 20.4% vs. 36.1 ± 22.7%, p < 0.02), and posterior segments (57.1 ± 17.6% vs. 38.5 ± 21.7%, p < 0.01). The torsion values did not demonstrate the statistical difference between two groups. Conclusion This study revealed the tendency of higher rotation values in preschool-age children than in school-age children. The lesser values of rotation and torsion with increased age during childhood warrant further investigation.
背景斑点跟踪超声心动图有助于评估局部心肌变形。虽然以前的报道显示左心室扭转随年龄增长无明显变化,但左心室底端和尖端旋转有一定差异。本研究的目的是评估儿童左室旋转扭转的变化及其与年龄的关系。方法选取健康儿童40例,按学龄前(2 ~ 6岁)和学龄(7 ~ 12岁)分为两组,每组20例。在获得常规超声心动图数据后,用斑点跟踪超声心动图评估根尖和基底短轴旋转。采用沿中轴的6个心肌节段测定左室在基底和根尖短轴平面的旋转。结果学龄前和学龄儿童左室旋转的根尖和根底旋转随年龄增长无统计学差异。根尖径向应变在学龄前儿童中较高,尤其是在前节段(52.8±17.4%比34.7±23.2%,p < 0.02)、外侧节段(55.8±20.4%比36.1±22.7%,p < 0.02)和后节段(57.1±17.6%比38.5±21.7%,p < 0.01)。扭转值在两组间无统计学差异。结论学龄前儿童的旋转值高于学龄儿童。儿童时期旋转和扭转值随年龄增长而减小值得进一步研究。
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引用次数: 5
Left Ventricular Diastolic Dyssynchrony in Post-Myocardial Infarction Patients: Does It Predict Future Left Ventricular Remodeling? 心肌梗死后患者左室舒张不同步:它能预测未来左室重构吗?
Pub Date : 2016-09-01 DOI: 10.4250/jcu.2016.24.3.193
Ju-Hee Lee
Left ventricular (LV) remodeling is well-known complication after myocardial infarction (MI) and numerous studies have emphasized the clinical importance of ventricular remodeling. In these literatures, progressive LV dilatation and decreased LV ejection fraction were major determinants in future development of heart failure and long term survival. That is why early recognition of patients at risk for LV remodeling after MI has vital importance and identification of the predictive markers for developing ventricular remodeling is clinically meaningful. While the clinical importance of LV mechanical dyssynchrony is mainly described in heart failure patients, its significance in patients with MI was less well established. Actually, ventricular dyssynchrony is not uncommon in post-MI patients even with narrow QRS complexes. Zhang et al. and Fahmy Elnoamany et al. noted LV systolic dyssynchrony early after MI in 69.8% and 77.5% of the patients and it was mainly determined by the initial infarct size. After that, various parameters from tissue Doppler imaging and speckletracking technique have been used for detecting regional contraction and relaxation abnormalities and LV systolic and diastolic dyssynchrony early after MI. Several studies demonstrated that LV systolic dyssynchrony in post-MI patients is closely related with future LV remodeling and poor prognosis. Mollema et al. showed that patients with more extensive LV dyssynchrony at baseline have larger LV end systolic volume after 6 months of follow up and increased risk of LV remodeling. Similar results were showed by Zhang et al. that LV systolic dyssynchrony increased with worsening LV pISSN 1975-4612/ eISSN 2005-9655 Copyright © 2016 Korean Society of Echocardiography www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.193
左心室重构是心肌梗死(MI)后常见的并发症,许多研究都强调了心室重构的临床重要性。在这些文献中,渐进性左室扩张和左室射血分数下降是心衰未来发展和长期生存的主要决定因素。这就是为什么早期识别心肌梗死后存在左室重构风险的患者至关重要,确定发生心室重构的预测标志物具有临床意义。虽然左室机械非同步化的临床重要性主要在心力衰竭患者中被描述,但其在心肌梗死患者中的意义却没有得到很好的证实。实际上,心室非同步化在心肌梗死后患者中并不罕见,即使QRS复合物狭窄。Zhang等和Fahmy Elnoamany等发现69.8%和77.5%的患者在心肌梗死后早期出现左室收缩不同步,主要由初始梗死面积决定。此后,组织多普勒成像和斑点跟踪技术的各种参数被用于检测心肌梗死后早期局部收缩舒张异常和左室收缩舒张不同步。多项研究表明,心肌梗死后患者左室收缩不同步与未来左室重构和预后不良密切相关。Mollema等研究表明,基线时左室非同步化程度更广泛的患者在随访6个月后左室末期收缩容积更大,左室重构风险增加。Zhang等人也有类似的结果,左室收缩不同步运动随着左室恶化而加重。pISSN 1975-4612/ eISSN 2005-9655版权所有©2016 Korean Society of Echocardiography www.kse-jcu.org http://dx.doi.org/10.4250/jcu.2016.24.3.193
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引用次数: 5
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Journal of cardiovascular ultrasound
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