目的 探讨心磁图对老年冠心病患者的诊断及介入治疗后的随访价值.方法 应用德国SQUID7通道非屏蔽心磁图仪,因胸闷入院进行冠状动脉造影的老年患者90例,分为对照组（44例,冠状动脉病变＜50%）和冠心病组（46例,至少1支冠状动脉病变≥70%...目的 探讨心磁图对老年冠心病患者的诊断及介入治疗后的随访价值.方法 应用德国SQUID7通道非屏蔽心磁图仪,因胸闷入院进行冠状动脉造影的老年患者90例,分为对照组（44例,冠状动脉病变＜50%）和冠心病组（46例,至少1支冠状动脉病变≥70%）.冠心病组患者31例按时完成3次检测.选择心脏复极过程,以每12ms为间隔作出S-T间期的电流密度分布图,以每幅图分级的平均数（ACTM）、异常电流分布图占所有电流密度分布图的比率（RAM）作为判断标准.结果 冠心病组ACTM（3.04±0.64 vs 2.72±0.82,P＜0.05）和RAM[（65.28±31.50）% vs （50.84±36.26）%,P＜0.05]明显高于对照组.支架治疗后24～72 h ACTM、RAM较介入治疗前有所改善,但差异无显著性意义;介入治疗后1个月ACTM、RAM改善明显,差异有显著性意义.结论 心磁图是一种无创性的、敏感性较高的筛选冠心病的新方法.同时是一种随访治疗效果和预后的简易方法.展开更多
Fetal complete atrioventricular bl ock(AVB)occurs in 2-5%of Sjgren’s antibodies(SSA /SSB)-positive preg-nancies with substantialmorbidity andmortality.We evalu-ated the incidence of 1°and 2°AVB by m easur...Fetal complete atrioventricular bl ock(AVB)occurs in 2-5%of Sjgren’s antibodies(SSA /SSB)-positive preg-nancies with substantialmorbidity andmortality.We evalu-ated the incidence of 1°and 2°AVB by m easuring Doppler -derived mechanical PR inte rvals.We compared mechanical PR intervals of fetuses o f SSA /SSB positive mothers referred to a single cardiology center between 1997and 2003with control fetuses and fetuses with 1°or 2°AVB confirmed by magnetocardiography o r postnatal electrocar-diogram.One hundred thirty -nine fe tal echocardiograms performed on 59SSA /SSB -positive pr egnant women at24.3±5.0weeks gestation were compared with 150controls.Mechanical PR intervals o f the study group(120.5±9.8milliseconds)and controls(120.6±8.7milliseconds)were the same but differed significa ntly fromfetuses with 1°and 2°AVB(191.5±29.6msec).The in-cidence of 1°and°2fetal AVB in SSA /S SB -positive pregnancies is low and can be identif ied by abnormal me-chanical PR interval.展开更多
A statistical algorithm for the reconstruction from time sequence echocardiographic images is proposed in this paper. The ability to jointly restore the images and reconstruct the 3D images without blurring the bounda...A statistical algorithm for the reconstruction from time sequence echocardiographic images is proposed in this paper. The ability to jointly restore the images and reconstruct the 3D images without blurring the boundary is the main innovation of this algorithm. First, a Bayesian model based on MAP-MRF is used to reconstruct 3D volume, and extended to deal with the images acquired by rotation scanning method. Then, the spatiotemporal nature of ultrasound images is taken into account for the pa-rameter of energy function, which makes this statistical model anisotropic. Hence not only can this method reconstruct 3D ul-trasound images, but also remove the speckle noise anisotropically. Finally, we illustrate the experiments of our method on the synthetic and medical images and compare it with the isotropic reconstruction method.展开更多
文摘目的 探讨心磁图对老年冠心病患者的诊断及介入治疗后的随访价值.方法 应用德国SQUID7通道非屏蔽心磁图仪,因胸闷入院进行冠状动脉造影的老年患者90例,分为对照组（44例,冠状动脉病变＜50%）和冠心病组（46例,至少1支冠状动脉病变≥70%）.冠心病组患者31例按时完成3次检测.选择心脏复极过程,以每12ms为间隔作出S-T间期的电流密度分布图,以每幅图分级的平均数（ACTM）、异常电流分布图占所有电流密度分布图的比率（RAM）作为判断标准.结果 冠心病组ACTM（3.04±0.64 vs 2.72±0.82,P＜0.05）和RAM[（65.28±31.50）% vs （50.84±36.26）%,P＜0.05]明显高于对照组.支架治疗后24～72 h ACTM、RAM较介入治疗前有所改善,但差异无显著性意义;介入治疗后1个月ACTM、RAM改善明显,差异有显著性意义.结论 心磁图是一种无创性的、敏感性较高的筛选冠心病的新方法.同时是一种随访治疗效果和预后的简易方法.
文摘Fetal complete atrioventricular bl ock(AVB)occurs in 2-5%of Sjgren’s antibodies(SSA /SSB)-positive preg-nancies with substantialmorbidity andmortality.We evalu-ated the incidence of 1°and 2°AVB by m easuring Doppler -derived mechanical PR inte rvals.We compared mechanical PR intervals of fetuses o f SSA /SSB positive mothers referred to a single cardiology center between 1997and 2003with control fetuses and fetuses with 1°or 2°AVB confirmed by magnetocardiography o r postnatal electrocar-diogram.One hundred thirty -nine fe tal echocardiograms performed on 59SSA /SSB -positive pr egnant women at24.3±5.0weeks gestation were compared with 150controls.Mechanical PR intervals o f the study group(120.5±9.8milliseconds)and controls(120.6±8.7milliseconds)were the same but differed significa ntly fromfetuses with 1°and 2°AVB(191.5±29.6msec).The in-cidence of 1°and°2fetal AVB in SSA /S SB -positive pregnancies is low and can be identif ied by abnormal me-chanical PR interval.
基金Project supported by the National Basic Research Program (973) of0China (No. 2003CB716104), and Shanghai Science and TechnologyResearch Foundation (No. 034119820), China
文摘A statistical algorithm for the reconstruction from time sequence echocardiographic images is proposed in this paper. The ability to jointly restore the images and reconstruct the 3D images without blurring the boundary is the main innovation of this algorithm. First, a Bayesian model based on MAP-MRF is used to reconstruct 3D volume, and extended to deal with the images acquired by rotation scanning method. Then, the spatiotemporal nature of ultrasound images is taken into account for the pa-rameter of energy function, which makes this statistical model anisotropic. Hence not only can this method reconstruct 3D ul-trasound images, but also remove the speckle noise anisotropically. Finally, we illustrate the experiments of our method on the synthetic and medical images and compare it with the isotropic reconstruction method.
