扩张型心肌病患者左心室能量损耗及室壁剪应力的血流向量成像评价

目的应用血流向量成像（VFM）技术定量评估扩张型心肌病（DCM）患者的左心功能异常。 方法选取2019年1月至2019年4月于武汉亚洲心脏病医院确诊DCM的患者29例为DCM组,同期匹配健康志愿者32例为对照组。VFM模式下获取两组心尖四腔心、三腔心切面二维彩色多普勒血流动态图,脱机分析对比不同切面等容收缩期（P0）、快速射血期（P1）、等容舒张期（P2）、快速充盈期（P3）、心房收缩期（P4）能量损耗（EL）及各节段室壁剪应力（WSS）平均值的差异,评估DCM患者左心室血流动力学的改变。 结果与对照组相比,DCM组在P0、P1及P3期EL均减低［分别为（2.24±1.33）J/（s·m³）vs（1.39±0.49）J/（s·m³）、（6.14±3.58）J/（s·m³）vs（4.17±2.12）J/（s·m³）、（10.38±6.67）J/（s·m³）vs（4.92±2.73）J/（s·m³）,均P＜0.05］。DCM组左心室壁在P0期基底段［（0.45±0.30）N/m² vs（0.23±0.13）N/m²］,P1、P2期基底段和中间段［分别为（1.24±0.39）N/m² vs（0.93±0.40）N/m²、（0.55±0.30）N/m² vs（0.36±0.23）N/m²,（0.29±0.08）N/m² vs（0.12±0.05）N/m²、（0.14±0.08）N/m² vs（0.10±0.06）N/m²］,P3期各节段［分别为（0.60±0.24）N/m² vs（0.26±0.08）N/m²、（0.47±0.29）N/m² vs（0.14±0.04）N/m²、（0.13±0.06）N/m² vs（0.06±0.02）N/m²］以及P4期基底段［（0.40±0.15）N/m² vs（0.25±0.12）N/m²］的WSS较对照组均减低（均P＜0.05）。对照组WSS同一时相呈现基底段＞中间段＞心尖段,而DCM组P0、P2和P4期基底段与中间段WSS差异无统计学意义（均P＞0.05）。对照组WSS同一节段P0→P1→P2→P3→P4期表现为升高－减低－升高－减低改变（均P＜0.05）,而DCM组WSS仅基底段P0→P1→P2→P3期表现为升高－减低－升高趋势（均P＜0.05）,余节段WSS在各时相间变化差异均无统计学意义（均P＞0.05）。 结论VFM技术中的EL及WSS作为新的血流动力学量化参数,可评估DCM患者左心室功能异常。     

超声血流向量成像技术评价2型糖尿病患者左心室舒张期能量损耗

目的应用超声血流向量成像（VFM）技术评价2型糖尿病（D2M）患者舒张期左心室心腔血液流场状态,探讨左心室能量损耗（EL）定量评价D2M患者左心室舒张功能障碍的应用价值。 方法选取2014年12月至2015年5月四川省人民医院收治的D2M患者62例（D2M组）及同期健康体检者39名（健康对照组）。采集2组受检者常规二维超声图像及3个完整心动周期动态标准心尖三腔（AP3c）彩色多普勒血流图,测量左心室常规径线及舒张功能参数。将AP3c彩色多普勒动态图导入图像后处理工作站,获取舒张期左心室心腔EL参数和时间流量曲线（T-F curve）;根据T-F curve将舒张期分为等容舒张期（P1）、舒张早期（P2）、快速充盈期（P3）、减慢充盈期（P4）、心房收缩期（P5）、舒张末期（P6）6期。记录每一时相EL值（Pn-EL,n=1~6）。采用Wilcoxon秩和检验比较2组受检者舒张期各时相EL参数差异。采用Spearman相关分析分析2组受检者EL与左心室舒张功能参数的相关性。 结果D2M组患者P1-EL、P2-EL、P3-EL、P4-EL、P5-EL、P6-EL分别为5.233、4.328、17.249、9.043、13.829、9.765 N/（m ? s）,健康对照组受检者P1-EL、P2-EL、P3-EL、P4-EL、P5-EL、P6-EL分别为3.191、2.587、16.025、6.324、8.858、8.093 N/（m ? s）。D2M组患者舒张期P1-EL、P2-EL、P4-EL、P5-EL、P6-EL均高于健康对照组受检者,且差异均有统计学意义（Z值分别为-3.042、-2.386、-2.103、-2.763、-2.107,P均<0.05或0.01）;D2M组患者舒张期P3-EL也高于健康对照组受检者,但差异无统计学意义。D2M组患者P3-EL与E、E/A均呈显著正相关（r=0.741、0.599,P均<0.01）,与e、E/e均呈正相关（r=0.3、0.253,P均<0.05）;P5-EL与A、a值均呈显著正相关（r=0.578、0.384,P均<0.01）,而与E/A、e/a均呈显著负相关（r=-0.427、-0.537,P均<0.01）。健康对照组受检者P3-EL与E呈显著正相关（r=0.732,P<0.01),与E/A、e均呈正相关（r=0.4、0.321,P均<0.05）;P5-EL与A、a均呈正相关（r=0.688、0.399,P均<0.05）,与E/A呈负相关（r=-0.406,P<0.05）。 结论D2M患者舒张期部分时相左心室EL增高,有望成为定量评价左心室舒张功能障碍的指标之一。特定时相左心室EL与左心室血流动力学状态相关。     

血流向量成像技术评价肥厚型心肌病左心室收缩期血流动力学特征

目的 应用超声血流向量成像(VFM)技术评价肥厚型心肌病(HCM)左室收缩期血流动力学特征及流场分布特点.方法 随机选取肥厚型非梗阻性心肌病患者35例作为病例组,健康成年志愿者40例为对照组,比较两组左室收缩期峰值流速(Vs)、峰值流量(Fs)及收缩期负向总流量(SQ-),观察两组速度向量、流线和涡流分布特点.结果 对照组Vs、Fs、SQ- 及病例组Vs、Fs均由基底段、中间段至心尖段呈递减趋势,差异均有统计学意义(P＜0.05);而病例组SQ- 失去这种顺序递减趋势.病例组各节段Vs、Fs及中间段、心尖段SQ- 均大于对照组,但基底段SQ- 明显小于对照组(P＜0.01).与对照组比较,病例组血流流场分布特点为速度方向混乱,流速快,流线不连续,涡流增多.结论 VFM技术能够定量评价HCM患者左室收缩期血流动力学特征,并能清晰显示血流流场的分布情况.

Abstract：

Objective To investigate the left ventricular(LV) systolic hemodynamics and the distribution of blood flow in patients with hypertrophic cardiomyopathy(HCM) by vector flow mapping(VFM).MethodsThirty-five random non-obstructive HCM patients(case group) and forty healthy volunteers (control group) were enrolled.Peak systolic velocity (Vs),peak systolic flow (Fs) and total systolic negative flow (SQ-) of two groups were compared.Velocity vector,streamline and vortex distribution of two groups were observed.Results Vs,Fs,SQ- of the control group and Vs,Fs of the case group all showed a decreasing trend from the basal segments to the apical segment(P<0.05).SQ- of the case group lost this decreasing tendency.Vs,Fs of all segments and SQ- of the middle and apical segment of the case group were higher than those of the control group.SQ- of the basal segment of the case group were significantly lower than that of the control group(P＜0.01).Distribution of blood flow:The velocity of blood flow was faster in the case group than that in the control group and the direction was disordered.The streamlines of the case group were discontinuous,and vortexes in the case group were more than that in the control group.Conclusions VFM technology could quantitatively evaluate LV systolic hemodynamics in patients with HCM,and can clearly show the distribution of blood flow.     

血流向量成像技术评价肥厚型心肌病患者左室功能的初步研究

目的应用血流向量成像(VFM)技术观察肥厚型心肌病(HCM)患者左室收缩期及舒张期能量损耗和循环变化,评价其左室收缩及舒张功能。方法选取26例非梗阻性HCM患者(HCM组)和36例健康志愿者(对照组),分别在标准心尖四腔、三腔及两腔观提取收缩早期、收缩中期、收缩晚期、舒张早期、舒张中期及左房收缩期6个时相的循环参数(涡旋数量、涡旋面积、循环强度)和基底段、中间段、心尖段平均能量损耗(EL)的参数,比较两组上述各参数变化。应用双多普勒同步取样技术获取二尖瓣口舒张早期血流峰值速度(E)、二尖瓣口舒张晚期血流峰值速度(A)、二尖瓣口舒张早期血流速度与室间隔侧二尖瓣环舒张早期运动峰值速度之比(E/e)、Tei指数及心指数,并将其分别与各时相循环和能量损耗参数进行相关性分析。结果 HCM组与对照组在舒张早期心尖段、左房收缩期中间段、收缩早期基底段,以及收缩中、晚期基底段、中间段、心尖段的EL比较,差异均有统计学意义(均P0.05);两组EL在各个时相从基底段到心尖段依次减低,差异均有统计学意义(均P0.01)。两组在舒张早期涡旋数量和舒张中期涡旋数量、涡旋面积、循环强度比较,差异均有统计学意义(均P0.05);两组在收缩早期、收缩中期仅涡旋面积差异有统计学意义(P0.05)。舒张早期循环强度与E呈正相关(r=0.456,P0.01);左房收缩期循环强度与A呈正相关(r=0.485,P0.01);收缩中期基底段EL与心指数呈负相关(r=-0.363,P0.01);左房收缩期基底段、中间段EL与E/e均呈正相关(r=0.310,P0.05;r=0.444,P0.01)。结论 VFM技术能量损耗和循环参数对于早期发现心功能异常更加敏感,可作为评价心脏早期功能变化的新指标。     

超声血流向量成像对痛风患者左心室能量损耗的初步评价

目的应用超声血流向量成像（VFM）技术初步评价痛风患者左心室能量损耗并探讨其临床应用价值。 方法选取2019年12月至2020年6月在四川省人民医院确诊的痛风患者45例为痛风组,同期收集四川省人民医院体检的健康志愿者40例为对照组。根据病程将痛风患者分为长病程组（24例）和短病程组（21例）。同时根据年龄将痛风患者分为中年痛风组（22例）和青年痛风组（23例）,将对照组分为中年对照组（20例）和青年对照组（20例）。所有研究对象均行经胸超声心动图获取常规超声心动图数据。采用VFM工作站离线分析1个心动周期7个时相（P1~P7）的平均能量损耗（EL）,7个时相分别为等容舒张期（P1）、舒张早期（P2）、舒张中期（P3）、舒张晚期（P4）、等容收缩期（P5）、收缩早期（P6）、收缩晚期（P7）。分析比较痛风组与对照组以及各亚组间各时相校正后的能量损耗值（ELc）的差异,以及各时相ELc与常规超声心动图参数、ELc与痛风患者年龄和病程之间的相关性。 结果痛风组ELcP3、ELcP6、ELcP7均大于对照组（P均＜0.05）。长病程组年龄、E/e、ELcP4、ELcP5大于短病程组（P均＜0.05）。中年痛风组E/e、ELcP3大于中年对照组（P均＜0.05）,青年痛风组ELcP3、ELcP6大于青年对照组（P均＜0.05）。舒张期参数：E/e与ELcP2、ELcP4呈正相关（r=0.306、0.405,P均＜0.01）,E/A与ELcP4呈负相关（r=-0.364,P＜0.01）,E/A与ELcP2呈正相关（r=0.409,P＜0.01）;收缩期参数：LVEF与ELcP6呈正相关（r=0.306,P＜0.01）;年龄与ELcP4、ELcP5呈正相关（r=0.622、0.671,P均＜0.01）;病程与ELcP4、ELcP5、ELcP7呈正相关（r=0.433、0.465、0.300,P均＜0.01）。 结论VFM技术可定量评估痛风患者左心室流场状态,痛风患者存在左心室早期轻度舒张及收缩功能受损,且受损程度与病程及年龄相关。超声心腔内流体能量损耗参数有望成为检测痛风患者早期左心室舒张及收缩功能异常的新方法。     

血流向量成像技术评价慢性肾脏病合并舒张功能不全患者左心室能量损耗

目的 应用血流向量成像(VFM)技术分析慢性肾脏病(CKD)合并舒张功能不全患者左心室能量损耗(EL)的变化特点,探讨其在评估CKD患者左心室舒张功能中的临床价值.方法 选取2017年2月至2018年11月在河北医科大学第二医院治疗的58例CKD患者,依据舒张功能不全严重程度,将其分为左心房压力正常的Ⅰ级舒张功能障碍组...     

Left ventricular wall thickness in patients with hypertrophic cardiomyopathy: a comparison between cardiac magnetic resonance imaging and echocardiography

We assessed whether cardiac MRI (CMR) and echocardiography (echo) have significant differences measuring left ventricular (LV) wall thickness (WT) in hypertrophic cardiomyopathy (HCM) as performed in the clinical routine. Retrospectively identified, clinically diagnosed HCM patients with interventricular-septal (IVS) pattern hypertrophy who underwent CMR and echo within the same day were included. Left Ventricular WT was measured by CMR in two planes and compared to both echo and contrast echo (cecho). 72 subjects, mean age 50.7 ± 16.2 years, 68 % males. Interventricular septal WT by echo and CMR planes showed good to excellent correlation. However, measurements of the postero-lateral wall showed poor correlation. Bland–Altman plots showed greater maximal IVS WT by echo compared to CMR measurement [SAX = 1.7 mm (?5.8, 9.3); LVOT = 1.1 mm (?5.6, 7.8)]. Differences were smaller between cecho and CMR [SAX = 0.8 mm (?9.2, 10.8); LVOT = ?0.2 mm (?10.0, 9.6)]. Severity of WT by quartiles showed greater differences between echo and SAX CMR WT compared to cecho. Echocardiography typically measures greater WT than CMR, with the largest differences in moderate to severe hypertrophy. Contrast echocardiography more closely approximates CMR measurements of WT. These findings have potential clinical implications for risk stratification of subjects with HCM.     

血流向量成像技术分析肥厚型心肌病患者左室血流动力学变化的临床研究

目的 应用血流向量成像（VFM）技术评价肥厚型心肌病患者左室血流动力学变化及室壁整体舒缩功能.方法 选取肥厚型心肌病患者（病变组）26例和对照组31例,应用VFM技术分析其快速射血期、减慢射血期及等容舒张期的涡流及流线特征,测量涡流横、纵径及快速射血期二尖瓣水平左室流出道与乳头肌水平左室心腔的速度阶差（ΔV）.结果 ①与对照组比较,病变组快速射血期、减慢射血期及等容舒张期显示涡流更大、更散乱、持续时间更长,两组间比较病变组涡流横径、纵径值明显大于对照组,差异有统计学意义.②对照组流线起止规律,流线齐整;病变组流线杂乱起止可在左室不同部位.③病变组收缩期左室流出道速度阶差显著高于对照组.结论 VFM技术可直观反映肥厚型心肌病患者左室血流动力学变化,从而为评估心功能提供早期参考.     

超声血流向量成像技术评价扩张型心肌病左心室血流状态的变化

目的 应用超声血流向量成像(VFM)技术探讨心腔内血流的结构变化及其与左室功能之间的关系.方法 选取扩张型心肌病患者26例、正常对照44例为观察对象,利用VFM软件采集左室内血流向量图像,应用VFM分析软件DSA-RS1测量收缩期心尖部-主动脉瓣口速度阶差(△Vs)、心尖部-主动脉瓣口距离(Ds)、半距对应速度(Vs1/2);舒张期二尖瓣口-心尖部速度阶差(△Vd)、二尖瓣口-心尖部距离(Dd)、半距对应速度(Vd1/2).结果 与对照组相比,DCM组收缩期△Vs、Vs1/2与舒张期△Vd、Vd1/2明显降低,收缩期Ds与舒张期Dd明显延长,差异均具有统计学意义(P＜0.05).Ds、Dd与舒张末期容积、收缩末期容积、左室内径呈正相关(r＞0.4,P＜0.01),与收缩功能呈负相关(r＞0.3,P＜0.01);Vs1/2、Vd1/2与舒张末期容积、收缩末期容积、左室内径呈负相关(r＞0.3,P＜0.01),与收缩功能呈正相关(r＞0.3,P＜0.01).结论 扩张型心肌病患者心腔内血流速度明显低于正常人,VFM是一种无创评价扩张型心肌病左室内血流动力学变化的新方法.     

Left ventricular mechanical dispersion is associated with nonsustained ventricular tachycardia in hypertrophic cardiomyopathy

Objective: We assessed the value of speckle tracking two-dimensional (2D) strain echocardiography (2DSE) measured mechanical dispersion (MD) with other imaging and electrocardiographic parameters in differentiating hypertrophic cardiomyopathy (HCM) patients with and without nonsustained ventricular tachycardia (NSVT) on 24-h ambulatory ECG monitoring.

Methods and results: We studied 31 patients with HCM caused by the Finnish founder mutation MYBPC3-Q1061X and 20 control subjects with comprehensive 2DSE echocardiography and cardiac magnetic resonance imaging (CMRI). The presence of NSVT was assessed from ambulatory 24-h ECG monitoring.

NSVT episodes were recorded in 11 (35%) patients with HCM. MD was significantly higher in HCM patients with NSVT (93?±?41?ms) compared to HCM patients without NSVT (50?±?18?ms, p?=?0.012) and control subjects (41?±?16?ms, p?Conclusions: Increased mechanical dispersion was associated with NSVT in HCM patients on 24-h ambulatory ECG monitoring.

• Key messages

• The prediction of sudden cardiac death in hypertrophic cardiomyopathy remains a challenge and novel imaging methods are required to identify individuals at risk of malignant ventricular arrhythmias.

• Mechanical dispersion by speckle tracking echocardiography is associated with NSVT on 24-h ambulatory ECG monitoring in patients with hypertrophic cardiomyopathy

     

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.     

应用血流向量成像观察扩张型心肌病左心室内涡流特征

目的 应用血流向量成像技术观察左室内涡流的形成及演变情况,评价扩张型心肌病(DCM)的左心室功能.方法 选取DCM患者26例、正常对照44例为观察对象,采集左室内血流向量图像,观察心动周期中不同时相涡流的位置、大小、圈数分布及其演变规律.结果 ①正常对照组缓慢射血期和等容舒张期左室内未见涡流形成,舒张期涡流多位于二尖瓣前叶附近,左室中上部1/3,形态多变(变化2～3次);涡流横径、纵径和圈数在心动周期的7个时相之间有差异.②DCM组心动周期7个时相均有涡流出现,舒张期出现涡流更靠近左室中下2/3,向心尖部靠近,相对正常人而言,DCM组在同一时相出现的涡流形态、部位变化更多(4～5次);心动周期的各个时相中DCM组左室内涡流的横径、纵径和圈数均大于正常对照组.DCM组涡流大小和圈数在心动周期的7个时相之间也有差异.结论 血流向量成像技术可以显示在体的左室内涡流变化情况,DCM患者左室内涡流大小及圈数均大于正常人.     

超声向量血流图对原发性高血压患者左心室涡流的初步研究

目的:应用向量血流图(vector flow mapping)探讨高血压患者左心室涡流变化规律及特征。方法:39名健康志愿者和41例高血压患者(分为A组:左室构型正常组;B组:向心性重构组;C组:向心性肥厚组)分别接受常规超声心动图检查,采集心尖三腔心切面图像后脱机分析,观察左室内涡流衍变过程,比较各涡流描述参数。结果:高血压患者左室内涡流等容舒张期和舒张早、中期由小变大,数量由少变多,环数由松散变密集;舒张晚期、等容收缩期及射血期涡流再变小,环数仍较密集;持续整个心动周期。与对照组比较,B、C组在等容收缩期涡流峰值流量和涡流强度增大,A组差异无统计学意义(P=0.26);C组半流量面积、半流量涡流直径增大,A、B组差异无统计学意义(P>0.05)。结论:向量血流图技术能客观反映高血压患者心室内血液流场的变化,为高血压患者心室内血流结构及心功能研究提供了一种新方法。     

Left ventricular function in patients with hypertrophic cardiomyopathy and its relation to myocardial fibrosis and exercise tolerance

We sought to determine the relation between myocardial extracellular volume (ECV), left ventricular (LV) diastolic function, and exercise tolerance in patients with hypertrophic cardiomyopathy (HCM). Forty five HCM patients with an ejection fraction >50% and no previous septal reduction therapy underwent imaging by CMR and transthoracic echocardiography. CMR was used to quantify LV volumes, mass, EF, LA volumes, scar burden, pre and post contrast T1 relaxation times and ECV. Echocardiography was used to measure outflow tract gradients, mitral inflow and annular velocities, circumferential strain, systolic, early and late diastolic strain rates. Exercise duration and peak oxygen consumption were noted. HCM patients had increased native T1 relaxation time and ECV vs. controls [ECV controls: 24.7 (23.2–26.4) vs. HCM: 26.8 (24.6–31.3)%, P?=?0.014]. Both parameters were significantly associated with LV diastolic dysfunction, circumferential strain, diastolic strain rate and peak oxygen consumption (r?=??0.73, P?<?0.001). Compared to controls, HCM patients have significantly longer native T1 relaxation time and higher ECV. These structural changes lead to worse LV global and segmental diastolic function and in turn reduced exercise tolerance.     

速度向量成像评价心尖肥厚性心肌病左室扭转角度和解旋的初步研究

目的 应用速度向量成像(VVI)技术评价心尖肥厚性心肌病(ApHCM)患者左室短轴心肌扭转角度与解旋运动.方法 应用VVI技术对23例ApHCM患者和23例正常人左室短轴心底和心尖水平的心内膜下心肌扭转角度和解旋进行定量分析.结果 与正常组比较,ApHCM组左室短轴心尖部心内膜下心肌收缩期峰值旋转角度、旋转速度以及左室扭转角度均减低(P＜0.05);而两组间心底部心内膜下心肌收缩期峰值旋转角度、旋转速度差异无统计学意义(P＞0.05).ApHCM组舒张早期左室心底部与心尖部心内膜下心肌的峰值解旋速度均低于正常组(P＜0.05).结论 VVI技术可有效评价ApHCM患者左室扭转角度与解旋运动特征,ApHCM患者左室心内膜下心肌的扭转角度与解旋运动均减低.

Abstract：

Objective To evaluate left ventricular(LV) twist and untwist using velocity vector imaging(VVI) in patients with apical hypertrophic cardiomyopathy (ApHCM). Methods Twenty-three patients diagnosed with ApHCM were consecutively enrolled and compared with normal controls. After a standard echocardiographic examination, parasternal basal and apical short-axis planes were scanned to quantify LV rotations,twist and LV untwist using VVI. Results Compared with the normal controls, the rotation and rotaional velocity of apical subendocardial myocardium were markedly decreased in ApHCM patients during the period of systole ( P＜0.05) ,but the decreases in basal planes were not significant. As a consequence,LV twist was significantly lower in ApHCM patients (P＜ 0.05). Compared to normal controls,the velocity of LV untwisting was also significantly decreased in ApHCM patients ( P＜0.05).Conclusions The twist and untwist of LV subendocardial myocardium were decreased in ApHCM patients.VVI is a useful method to assess the characteristics of LV twist and untwist in ApHCM patients.     

Dissipative energy loss within the left ventricle detected by vector flow mapping in diabetic patients with controlled and uncontrolled blood glucose levels

Diabetes mellitus (DM) is related to increased risks of cardiovascular diseases, such as myocardial infarction, diabetic cardiomyopathy and secondary hypertension. Dissipative energy loss (EL) derived from vector flow mapping (VFM) is thought to reflect the efficiency of blood flow and has been deemed to be an index for the evaluation of left ventricular function. Our study aimed to investigate the value of dissipative EL in diabetic patients with controlled and uncontrolled blood glucose by VFM. Eighty-eight patients with DM and 58 age-matched healthy controls were recruited. All of the patients received echocardiography examinations. VFM analyses were executed to calculate the EL values according to the apical four-chamber examinations from the left ventricle (LV) view. Our results showed that diastolic EL was compromised in the controlled-blood glucose (59.19 mV/m vs. 32.68 mV/m, p?=?0.039) patients and was more dramatically increased in the uncontrolled blood glucose group (88.84 mV/m vs. 32.68 mV/m, p?<?0.001) compared with the healthy controls. The impairment of systolic EL was observed only in the uncontrolled blood glucose patients (39.65 mV/m vs. 20.29 mV/m, p?<?0.001) and not in the controlled blood glucose patients (29.25 mV/m vs. 20.29 mV/m, p?=?0.072). Multivariate backward stepwise linear regression analysis revealed that the HbA1c level was independently related to the diastolic EL (β?=?0.233, p?=?0.026) and systolic EL (β?=?0.237, p?=?0.023). VFM is feasible and reproducible for assessing LV dissipative EL in DM patients with normal LVEF values in whom diastolic EL may be a more vulnerable indicator of early LV cardiac dysfunction in patients with DM. However, LV systolic EL may be a sensitive indicator of preclinical LV dysfunction for patients with DM with uncontrolled blood glucose levels. Uncontrolled blood glucose, which is independently correlated with subclinical LV dysfunction, may lead to increases in systolic EL and diastolic EL in LV.