Quantitative Study of Left Ventricular Anatomic Structure and Function By 256iCT

目的 应用256iCT对正常人左心室结构和功能相关指标进行定量研究,分析各指标与年龄和性别的关系.方法 搜集506例行256iCT冠状动脉CTA结果正常的患者的影像资料;所有患者近6个月无心血管疾病病史.对原始图像进行多期重组,确定左心室舒张末期及收缩末期,分别对左心室舒张末期和收缩末期的室间隔厚度(septal wall thickness,SWT)、左室后壁厚度(posterior wall thickness,PWT)、左室宽径(LV inner diameter,LVID)、舒张末期容积( end-diastolic volume,EDV)、收缩末期容积(end-systolic volume,ESV)、每搏输出量(stroke volume,SV)和射血分数(ejection fraction,EF)进行测量和计算,并进行相关统计学处理.结果 左心室舒张末期SWT、PWT、LVID 95％参考值范围分别为:4.4～12.1 mm,4.0～14.0 mm,28.1 ～60.8 mm.左心室收缩末期SWT、PWT、LVID 95％参考值分别为:6.2～15.7mm,7.9～20.8 mm,18.1 ～46.3 mm.EDV、ESV、SV、EF 95％参考值范围分别为:55.9 ～ 165.7 ml,20.9 ～75.9 ml,25.8 ～ 98.6 ml,39.8％ ～ 78.3％.收缩期LVID和舒张期LVID值不同年龄组之间差异有统计学差异(P＜0.05),并且随着年龄增长有增大趋势.收缩期SWT、舒张期SWT、收缩期PWT、舒张期PWT以及EF值有随着年龄增长而增大的趋势,同时EDV、ESV、SV值随着年龄增长有减小的趋势,但以上各指标在不同年龄组之间的差异均无统计学意义(P＞0.05).不同性别组分析显示除EF值无统计学差异以外,其余各指标均有统计学差异(P＜0.05),且男性组各参数均大于女性组.结论 初步制定了左心室形态、功能相关参数的正常参考值,为临床诊断、危险评级及预后判断提供有意义信息.     

双源CT在主动脉瓣置换术前左心功能评价中的应用

目的:以磁共振成像(MRI)为金标准,用双源CT(DSCT)定量评价左心功能,探讨DSCT在主动脉瓣置换术前左心功能评价中的应用价值.方法:选取临床诊断主动脉瓣病变欲行主动脉瓣置换术的患者21例,全部病例均行DSCT和MRI心功能分析检查.由有经验的2位放射科医生独立进行,结果以均数士标准差表示.两种仪器间测量值应用配对样本t检验及相关分析检验,同一仪器测量值的差异相互关系用组内相关系数描述,P ＜0.05为有统计学意义.结果:DSCT和MRI两种方法测量的心功能指标差异无统计学意义,舒张末期容积(EDV)、收缩末期容积(ESV)、每搏输出量(SV)、左室射血分数(EF)相关性高,r值(EDV)=0.93,r值(ESV)=0.94,r值(SV)=0.89,r值(EF)=0.85.EDV均值:DSCT＞ MRI;ESV均值:DSCT＞ MRI;SV均值:DSCT＞ MRI; EF均值:DSCT＞ MRI.同一仪器三次测量值的差异相互关系(ICC值):MRI测量的EDV、ESV、SV、EF值的ICC值在0.8～1之间;DSCT测量的EDV、ESV、SV、EF值的ICC值在0.6～0.75之间.结论:DSCT在左心室收缩功能定量评价方面准确、可靠,重复性好,并可在不增加放射剂量的前提下,一次DSCT冠状动脉造影检查同时评估冠状动脉狭窄情况和左心室收缩功能,能够为临床主动脉瓣置换术前评估及制订手术方案提供更多重要的参考信息.     

时间-空间相关成像技术评估宫内生长受限胎儿心功能的研究

目的 :探讨时间-空间相关成像技术评估孕晚期宫内生长受限(IUGR)胎儿的心功能变化。方法 :选择孕晚期30例IUGR胎儿和50例正常胎儿,分别作为研究组和对照组。在孕29~36周,通过时间-空间相关成像技术分别采集2组胎儿左心室收缩末期容积(ESV)和舒张末期容积(EDV),计算2组胎儿左心室每搏输出量(SV)、心输出量(CO)和射血分数(EF),并行统计学分析。结果:2组胎儿随着生长发育,SV和CO逐渐增加组间比较差异均有统计学意义(均P0.05),且均与孕龄呈正相关(均P0.05);EF则相对恒定(均P0.05)。结论 :时间-空间相关成像技术可较简便、准确地测量胎儿的心室ESV和EDV,IUGR组SV和CO明显低于正常组,EF评估胎儿心功能不够完善。     

超声心动图评价低温条件下兔左室局部心功能的变化

目的探讨低温对兔心脏收缩及舒张功能的影响。方法将24只新西兰大白兔随机分为常温组和低温组,每组12只。分别置于室温(22~25℃)以及低温(-15~-18℃)条件下。应用常规超声比较两组射血分数(EF)、心率(HR)、舒张末期容积(EDV)、收缩末期容积(ESV)、每搏输出量(SV)、短轴缩短率(FS)。应用组织多普勒超声技术(TDI)检测兔心尖四腔心切面二尖瓣环的收缩期和舒张早期峰值运动速度和应变率。结果常规超声心动图显示,低温组HR明显低于常温组(P<0.01),但两组EDV、ESV、SV、EF及FS比较差异无统计学意义(P>0.05)。低温组室间隔侧二尖瓣环舒张早期运动速度(Em)及二尖瓣环两侧舒张早期的峰值应变率(SRe)均明显低于正常组(P<0.05)。低温组二尖瓣环收缩期运动速度(Sm)及收缩期峰值应变率(SRs)也低于正常组,但差异无统计学意义(P>0.05)。结论低温条件可引起兔心功能的减低,并以舒张功能减低为主。超声心动图可以早期发现低温对兔局部心功能的影响。     

实时三维超声心动图在评估心梗患者左心功能的应用价值

目的:本研究以磁共振成像(MRI)检查结果为标准,应用实时三维超声心动图(real time 3-dimensional echocardiography,RT-3DE),定量评价左心室收缩功能,并比较同组病例的二维超声心动(two-dimensionalechocardiograp hy,2D)的心功能指标,探讨实时三维超声心动图在心梗患者心功能评价中的应用价值.方法:临床诊断心梗患者33例,均行心脏MRI、二维超声心动图、实时三维超声心动图.结果:RT-3DE和MRI两种方法的心功能指标差异无统计学意义,收缩末期容积(ESV)、舒张末期容积(EDV)、每搏输出量(SV)、左室射血分数(EF)相关性高(r=0.81～0.87);2D和MRI两种方法测量的心功能指标差异没有统计学意义,EDV、SV相关性较高(r值分别为0.61、0.67);ESV和EF值相关性中等或较低(r值分别为0.41和0.33).结论:RT-3DE能够准确、可靠的定量评价左心功能,用于定量评价心梗患者左心室收缩功能较2D更准确.     

320排CT在评价左心功能中的研究

目的研究320排CT在评价患者左心功能中的应用。方法采用320排CT评价86例原发性高血压患者左心功能,包括左心室舒张末期容积(end-diastolic volume,EDV)、收缩末期容积(end-systolic volume,ESV)、每搏输出量(stroke volume,SV)和射血分数(ejection fraction,EF),与超声心动图测定的相关指标进行比较。结果 320排CT测定的左心功能各项指标与超声心动图存在较高的相关性(r=0.76~0.90),两者无统计学差异(P0.05)。结论 320排CT在评价左心功能方面准确、可靠,与超声心动图所得各项指标相关性高,还可以同时进行冠脉病变诊断,具有较高的临床应用价值。     

双源CT和3.0T磁共振评价左心室功能的相关性研究

目的 对双源CT(dual-source CT,DSCT)和3.0T磁共振(magnetic resonance imaging,MRI)评价的左心室功能参数进行比较,评价其相关性.方法 心脏病患者20例,行双源CT和3.0T MRI检查,分别计算左心室舒张末期容积(end-diastolic volume,EDV)、收缩末期容积(end-systolic volume,ESV)及射血分数(ejection fraction,EF),以磁共振结果为标准,与双源CT结果进行对比,行相关性分析及一致性检验.结果 双源CT检查结果:EDV、 ESV和EF值分别是(118.80±19.43) ml,(43.65±18.06) ml,(63.75±10.59)%;相对的MRI结果分别是(102.39±19.41) ml,(47.82±19.25) ml,(54.34±11.15)%.DSCT测得的EDV 及EF值分别较MRI高估约16.42 ml(95%可信区间9.59～23.24)和9.41%(95%可信区间6.92～11.90),而DSCT测得的ESV较MRI低估约4.17 ml(95%可信区间-8.69～0.35);其Pearson相关系数(r)分别为EDV/ 0.718(P<0.001),ESV/ 0.868(P<0.001),EF/0.881(P<0.001 ) ;Spearman 秩相关系数 (rs)分别为 EDV/0.736(P<0.001),ESV/0.760(P<0.001),EF/0.645(P=0.002).结论 DSCT和3.0T MRI在评价左心室心功能上有很好的相关性,DSCT在一定程度上可以作为"一站式"的心脏检查工具.     

对比研究320排动态容积CT与3.O T MRI、超声心动图评价左心室功能的临床价值

目的与3.0 T MRI对比,研究320排动态容积CT及超声心动图(2-dimension echocardiography,2DE)评价左心室功能的准确性。方法选取临床怀疑左心室功能异常的患者64例,在1周内完成320排动态容积CT、3.0 T MRI及2DE 3种影像学检查,对比分析不同检查方法所获得的左心室功能参数:包括射血分数(EF)、舒张末期容积(EDV)、收缩末期容积(ESV)及每搏输出量(SV)。结果 3种影像学检查方法获得的SV值差异无统计学意义(F=0.861,P=0.424);而EF、EDV及ESV值差异均有统计学意义(分别为:F=3.406,P=0.035;F=4.647,P=0.011;F=5.235,P=0.006)。进一步两两对比3种检查方法间的EF、EDV及ESV值:320排CT与3.0 T MRI间的差异均无统计学意义(分别为:P=0.829,P=0.804,P=0.665);320排CT与2DE间的差异均有统计学意义(分别为:P=0.019,P=0.006,P=0.003);2DE与3.0 T MRI间的差异亦均有显著性(分别为:P=0.033,P=0.013,P=0.011)。结论 320排动态容积CT可以准确描述左心室功能,并能较超声心动图更准确地反映左心室功能参数,具有更高的临床应用价值。     

心肌SPECT显像观察卡托普利对犬心肌梗死后左心室重构的作用

目的 应用心肌SPECT显像观察卡托普利对实验犬急性心肌梗死后早期左心室重构的预防作用.材料与方法 34只杂种犬采用完全随机分组方法分为对照组(n=23)和治疗组(n=11).开胸结扎所有犬的左前降支制作心肌梗死模型.治疗组术前3d 口服卡托普利20mg,每天2次.术后6h行SPECT心肌显像,观察两组术前与术后左心室舒张末期容积( EDV)、收缩末期容积(ESV)、射血分数(EF)的变化.结果 ①对照组与治疗组分别有16只犬和6只犬成功建立模型并纳入实验.②对照组术前左心室EDV、ESV与术后比较,差异有统计学意义(t =2.81、2.83,P＜0.05);术前EF与术后比较,差异无统计学意义(t=0.06,P＞ 0.05).治疗组术前EDV、ESV、EF与术后比较,差异均无统计学意义(t=0.76、0.56、1.20,P＜0.05);两组术前EDV、ESV差异无统计学意义(t=0.08、0.94,P＞ 0.05),术后EDV、ESV差异有统计学意义(t=6.12、9.91,P＜0.05),EF差异无统计学意义(t=0.79,P＞0.05).结论 急性心肌梗死前预防性使用卡托普利可阻止早期左心室重构;心肌SPECT显像对评价预防性使用卡托普利控制急性心肌梗死后早期左心室重构有重要价值.     

心脏MR压缩感知超快速电影序列评价左右心室收缩功能的应用价值

目的对比传统分段采集电影序列(Seg), 探讨心脏MR(CMR)压缩感知(CS)超快速电影序列评价左右心室收缩功能的临床应用价值。方法前瞻性纳入2021年12月至2022年1月在阜外医院进行CMR检查的心脏疾病患者27例。随机顺序进行Seg、屏气下CS(bhCS)和自由呼吸下CS(fbCS)覆盖左右心室的多层短轴电影扫描。采用Friedman检验评价3种方法的总体图像质量、血池心肌信号比(BMC)和边缘锐度。分别测量3种方法的左心室舒张末期容积(EDV)、收缩末期容积(ESV)、每博输出量(SV)、射血分数(EF)、心肌质量(mass)及右心室EDV、ESV、SV、EF, 并用Bland-Altman分析bhCS与Seg、fbCS与Seg间测量结果的一致性, 并做相关性检验。结果 24例患者3种方法所有总体图像质量≥2分, 有诊断意义, 纳入后续分析。Seg、bhCS和fbCS的成像时间不同且依次降低, 分别为375.0(332.0, 405.6)、50.0(47.8, 53.7)和20.0(17.8, 23.7)s, 差异有统计学意义(χ2=48.00, P<0.001)。总体...     

Reference values for quantitative left ventricular and left atrial measurements in cardiac computed tomography

To assess reference values for left ventricular (LV) and left atrial (LA) dimensions, global LV function, and LV-myocardial mass for cardiac CT. We examined 120 subjects undergoing a coronary angiography using 64-slice and dual-source CT. All individuals had a low cardiovascular risk, normal ECG, negative biomarkers, and a normal cardiac CT examination. All subjects had a negative medical history of cardiovascular disease both on admission and at clinical 6-month follow-up. The following measurements were obtained: septal wall thickness (SWT), posterior wall thickness (PWT), LV inner diameter (LVID), LA anterior posterior diameter (LAD(sys)), end-systolic volume (ESV), and end-diastolic volume (EDV), LV-myocardial mass (LVMM). We found significant gender-related differences for all LV dimensions (SWT(sys), SWT(dia),PWT(sys),PWT(dia),LVID(sys),LVID(dia)). LAD(sys) showed no significant difference between males and females. Significant differences were found for global LV functional parameters including ESV, EDV, and SV, whereas no significant differences were found for the EF. LV-myocardial mass parameters showed significant gender-related differences. No significant correlation was found between any of these parameters and age. All data were transferred to percentile ranks. This study provides gender-related reference values and percentiles for LV and LA quantitative measurements for cardiac CT and should assist in interpreting results.     

256层iCT评价正常升主动脉弹性与左心功能的相关性

目的 利用256层iCT探讨正常升主动脉弹性与左心功能的相关性.方法 收集行256层iCT冠状动脉CT血管成像(CTA)且冠状动脉正常,同时行超声检查无升主动脉粥样硬化的志愿者105例,分别按年龄分成3组、按性别分成2组,CT测量左室功能的诸参数:收缩末期容积(ESV)、舒张末期容积(EDV)、每搏输出量(SV)、射血分数(EF)、心输出量(CO)、心肌质量(MM);CT、超声2种方法测量冠状窦上方15 mm处升主动脉的最大及最小横断面积,计算主动脉弹性,评价升主动脉弹性与左心功能的相关性.结果 Bland-Altman图显示CT和超声测得升主动脉弹性值一致性良好(ICC=0.988,P<0.05);不同年龄组正常升主动脉弹性与EDV、ESV、SV、EF均有正相关关系,与MM有负相关关系,与CO没有相关性;与年龄呈负相关(r=-0.546,P<0.05).结论 正常升主动脉弹性与左心功能有一定的相关性,256层iCT能够准确测量升主动脉壁弹性并判断其与左心功能的关系,为临床评估心血管疾病的危险性提供了一定依据值.     

Assessment of left ventricular myocardial function using 16-slice multidetector-row computed tomography: comparison with magnetic resonance imaging and echocardiography

Objective To assess functional parameters using multidetector-row computed tomography (MDCT) and echocardiography and to compare the results with magnetic resonance imaging (MRI). Materials and methods End-diastolic-volume (EDV), end-systolic-volume (ESV), stroke-volume (SV), ejection-fraction (EF), and myocardial mass (MM) were calculated based on CT data sets from 52 patients. Echocardiography was performed in 24 of the 52 patients. The results from MDCT and echocardiography were compared with MRI. Results A strong correlation between MDCT and MRI (r=0.66–0.90) was found for all parameters. Echocardiography revealed a low or moderate correlation (0.05–0.59). Compared to MRI the average differences with MDCT were for EDV 15.1 ml, ESV 10.6 ml, SV 4.5 ml, EF 1.8%, and MM 8.2 g, for EDV determined by echocardiography 36.2 ml, ESV 6.8 ml, and EF 13.9%. Bland-Altman analysis revealed acceptable limits of agreement between MRI and MDCT. Conclusions MDCT enables reliable quantification of left ventricular function. Echocardiography was found to have only a moderate agreement of functional parameters with MRI.     

Assessment of left ventricular volumes and function: intraindividual comparison of multi-slice spiral CT and electron beam CT in an animal model

PURPOSE: To evaluate multi-slice spiral computed tomography (MSCT) for measurements of left ventricular volumes, ejection fraction (EF), and myocardial mass in comparison with electron beam CT (EBCT) as a reference method. MATERIAL AND METHODS: Six minipigs underwent both standardized contrast-enhanced MSCT (effective acquisition time per cardiac cycle 125.7+/-30.1 ms, reconstructed slice thickness 8 mm) and EBCT (acquisition time 50 ms, collimated slice thickness 8 mm). The contrast-to-noise ratio of the left ventricle was measured in each animal, and the contour sharpness of the myocardium was analyzed. Volumes (EDV, ESV, SV) ejection fraction (EF), and muscle mass were calculated by MSCT and by EBCT using the slice summation method. RESULTS: MSCT had a higher contrast-to-noise ratio and delineated the myocardial contours more sharply than EBCT. There was a close linear correlation between both modalities for all parameters (EDV: rP=0.88, ESV: rP=0.91, SV: rP=0.85, EF: rP=0.93; mass: rP=0.90; P<0.05 each). MSCT slightly overestimated ESV and slightly underestimated SV and EF compared with EBCT (P<0.05 each). CONCLUSIONS: Image quality in MSCT is superior to that of EBCT. Functional parameters correlate well between both modalities, but the accuracy of MSCT is limited by its lower temporal resolution.     

Assessment of global left ventricular function: comparison of cardiac multidetector-row computed tomography with angiocardiography

OBJECTIVE: Evaluation of left ventricular function using electrocardiogram (ECG)-gated multidetector row CT (MDCT) by using 3 different volumetric assessment methods in comparison to assessment of the left ventricular function by invasive ventriculography. METHODS: Thirty patients with suspected or known coronary artery disease underwent MDCT coronary angiography with retrospective ECG cardiac gating. Raw data were reconstructed at the end-diastolic and end-systolic periods of the heart cycle. To calculate the volumes of the left ventricle, 3 methods were applied: The 3-dimensional data set (3D), the geometric hemisphere cylinder (HC), and the geometric biplane ellipsoid (BE) methods. End-diastolic volumes (EDV), end-systolic volumes (ESV), the stroke volumes (SV), and ejection fractions (EF) were calculated. The left ventricular volumetric data from the 3 methods were compared with measurements from left ventriculography (LVG). RESULTS: The best results were obtained using the 3D method; EDV (r = 0.73), ESV (r = 0.88), and EF (r = 0.76) correlated well with the LVG data. The EDV volumes did not differ significantly between LVG and the 3D method (P = 0.24); however, ESV, SV, and EF differed significantly. The ESV were significantly overestimated (P < 0.01), leading to an underestimation of the SV (P < 0.01) and the EF (P < 0.01). The HC method resulted in the greatest overestimation of the volumes. The EDV and the ESV were 31.8 +/- 37.6% and 136.4 +/- 92.9% higher than the EDV and ESV volumes obtained by LVG. Bland-Altman analysis showed systematic overestimation of the ESV using the HC method. CONCLUSION: MDCT with retrospective cardiac ECG gating allows the calculation of left ventricular volumes to estimate systolic function. The 3D method had the highest correlation with LVG. However, the overestimation of the ESV is significant, which led to an underestimation of the SV and the EF.     

Quantitative assessment of left ventricular function with dual-source CT in comparison to cardiac magnetic resonance imaging: initial findings

Cardiac magnetic resonance imaging and echocardiography are currently regarded as standard modalities for the quantification of left ventricular volumes and ejection fraction. With the recent introduction of dual-source computedtomography (DSCT), the increased temporal resolution of 83 ms should also improve the assessment of cardiac function in CT. The aim of this study was to evaluate the accuracy of DSCT in the assessment of left ventricular functional parameters with cardiac magnetic resonance imaging (MRI) as standard of reference. Fifteen patients (two female, 13 male; mean age 50.8 ± 19.2 years) underwent CT and MRI examinations on a DSCT (Somatom Definition; Siemens Medical Solutions, Forchheim, Germany) and a 3.0-Tesla MR scanner (Magnetom Trio; Siemens Medical Solutions), respectively. Multiphase axial CT images were analysed with a semiautomatic region growing algorithms (Syngo Circulation; Siemens Medical Solutions) by two independent blinded observers. In MRI, dynamic cine loops of short axis slices were evaluated with semiautomatic contour detection software (ARGUS; Siemens Medical Solutions) independently by two readers. End-systolic volume (ESV), end-diastolic volume (EDV), ejection fraction (EF) and stroke volume (SV) were determined for both modalities, and correlation coefficient, systematic error, limits of agreement and inter-observer variability were assessed. In DSCT, EDV and ESV were 135.8 ± 41.9 ml and 54.9 ± 29.6 ml, respectively, compared with 132.1 ± 40.8 ml EDV and 57.6 ± 27.3 ml ESV in MRI. Thus, EDV was overestimated by 3.7 ml (limits of agreement −46.1/+53.6), while ESV was underestimated by 2.6 ml (−36.6/+31.4). Mean EF was 61.6 ± 12.4% in DSCT and 57.9 ± 9.0% in MRI, resulting in an overestimation of EF by 3.8% with limits of agreement at −14.7 and +22.2%. Rank correlation rho values were 0.81 for EDV (P = 0.0024), 0.79 for ESV (P = 0.0031) and 0.64 for EF (P = 0.0168). The kappa value of inter-observer variability were amounted to 0.85 for EDV, ESV and EF. DSCT offers the possibility to quantify left ventricular function from coronary CT angiography datasets with sufficient diagnostic accuracy, adding to the value of the modality in a comprehensive cardiac assessment. The observed differences in the measured values may be due to different post-processing methods and physiological reactions to contrast material injection without beta-blocker medication. S. Busch and T. Johnson contributed equally to this study.     

体重指数对中国成年男性左心结构和功能影响的心血管MRI研究

目的应用心血管磁共振(cardiovascular magnetic resonance,CMR)评价体重指数(body mass index,BMI)对中国成年男性左心结构和功能的影响。方法选取2010年10月~2018年3月行CMR检查的男性体检者共420例,年龄30~50岁,按体重指数(BMI)分为三组,正常体重组(<24 kg/m²)164例、超重组(24.0~27.9 kg/m²)190例和肥胖组(≥28.0 kg/m²)66例。应用1.5T Siemens Magnetom Essenza和GE磁共振扫描仪进行CMR检查,应用CVI⁴²(v5.6.2,Canada)软件包进行心脏结构及功能参数的测量,将乳头肌纳入心肌质量,不计入心室容积;心室容积包含心室流出道,逐层勾画出左室心内膜、心外膜轮廓后计算得出以下参数:左心室舒张末期容积(EDV)、收缩末期容积(ESV)、射血分数(EF)、每搏输出量(SV)、心输出量(CO)、心肌质量(LVM)及经体表面积(BSA)校正的值:EDVI=EDV/BSA、ESVI=ESV/BSA、LVMI=LVM/BSA,左心室心肌质量容积比LVM/EDV。结果CO、LVM、LVM/EDV与BMI呈正相关(P<0.05)。与正常体重组比较,超重组及肥胖组EDV、SV显著增加,超重组EF较正常体重组增大(P<0.05)。经BSA校正,超重组ESVI、LVMI及肥胖组EDVI、ESVI、LVMI均与正常体重组差异有统计学意义(P<0.05),而超重与肥胖组两组间及ESV各组间差异无统计学意义(P=0.42)。结论BMI增加可使EDV、CO、SV、EF及LVM改变,且超重未达肥胖时,即可引起左心室重构、影响左心收缩功能;BSA可校正部分由BMI增加导致的左心结构功能参数改变的差异。     

室间隔缺损封堵术后左心功能的超声评价

目的应用超声心动图评价Amplatzer封堵器治疗室间隔缺损(VSD)患者于封堵术前后左心功能的变化。方法观察28例VSD患者封堵术前、术后1个月和术后6个月左室舒张末期内径(EDD)、舒张末期容积(EDV)、收缩末期容积()ESV、每搏输出量()SV、射血分数()和短轴缩短率()大小及变化。结果封堵术后1个月较术前差异具有显著性意义,EDDEFFS(P<0.05),EDV(P<0.001)ESV(P<0.05)SV(P<0.001)EF,FS无明显变化;封堵术后6个月,6项指标均恢复正常,较,,,术前差异具有显著性意义(P<0.001)。结论超声引导下VSD封堵术能够有效的改善VSD患者的左心功能。     

Measurement of ventricular volumes and function: a comparison of gated PET and cardiovascular magnetic resonance.

The aim of this study was to compare cardiac volume and function assessment using PET with the reference technique of cardiovascular magnetic resonance (CMR). METHODS: Left ventricular (LV) and right ventricular (RV) end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), and ejection fractions (EF) were measured in 9 patients using both CMR and PET with inhaled C(15)O. RESULTS: Correlation between the techniques was generally reasonable (r values ranged from 0.63 to 0.99). Best agreement was seen for ESV (LV and RV). With PET, there was a tendency to underestimate LV EF and EDV, and RV EDV and SV. Agreement was worst for LV SV. Percentage difference between CMR and PET measurements ranged from -2% to 15%; Bland-Altman limits of agreement ranged from 24% to 75%. CONCLUSION: Although small systematic differences exist, the agreement between PET and CMR suggests useful information regarding function, and volumes may be obtained from a standard PET protocol.