To assess fight ventficular free wall longitudinal myocardium deformation and examine the changes with normal age by speckle tracking imaging （STI）, myocardial systolic peak strain （ε）, systolic peak strain rate ...To assess fight ventficular free wall longitudinal myocardium deformation and examine the changes with normal age by speckle tracking imaging （STI）, myocardial systolic peak strain （ε）, systolic peak strain rate （SRs）, early diastolic peak strain rate （SRe）, late diastolic peak strain rate （SRa）, the ratio of SRe/SRa were measured in the basal, middle and apical segments of right ventficular free wall in 75 healthy volunteers （age range： 21-71 y） by STI from the apical 4-chamber view. RV longitudinal strain and strain rate were highest in the basal segment of the free wall. Older subjects had lower early diastolic strain rate （SRe） than younger subjects, but they had higher late diastolic strain rate （SRa）. A negative correlation between age and the ratio of SRe/SRa was found in all RV free wall segments （r=-4）.466 - -0.614, P〈0.01）. It is concluded that RV diastolic strain rate changes with age and STI can be used for the study of RV myocardial deformation.展开更多
目的:运用核素肺灌注显像对血压正常伴右室功能不全的急性肺栓塞患者溶栓治疗前后肺血流灌注进行观察和定量分析,为临床疗效评价提供准确和直观的客观依据。方法:36例急性肺栓塞患者分为溶栓组和抗凝组,在治疗前后均行肺灌注显像。应用...目的:运用核素肺灌注显像对血压正常伴右室功能不全的急性肺栓塞患者溶栓治疗前后肺血流灌注进行观察和定量分析,为临床疗效评价提供准确和直观的客观依据。方法:36例急性肺栓塞患者分为溶栓组和抗凝组,在治疗前后均行肺灌注显像。应用半定量法计算全肺灌注缺损百分数(percentage of pulmonary defect score,PPDs)和灌注改善百分数(percentage of pulmonary improve score,PPIs)。治疗前、治疗后7～10d及25～30d的PPDs分别记为PPDsD0、PPDsD10和PPDsD30。各组PPDsD0与PPDsD30之差、PPDsD0与PPDsD10之差、PPDsD10与PPDsD30之差分别记为PPIs、PPIsI1、PPIsI2。结果:溶栓组、抗凝组PPDs在治疗后均随时间显著降低(P<0.001);溶栓组PPIsI1明显大于抗凝组;两组PPIsI2无明显差异。在整个观察期间(治疗后1个月),溶栓组PPIs明显大于抗凝组。结论:溶栓治疗较单抗凝治疗能够更加迅速而持续地改善肺栓塞患者的肺血流灌注,应用肺灌注显像可以准确地评价患者治疗前后的肺血流变化。展开更多
文摘To assess fight ventficular free wall longitudinal myocardium deformation and examine the changes with normal age by speckle tracking imaging （STI）, myocardial systolic peak strain （ε）, systolic peak strain rate （SRs）, early diastolic peak strain rate （SRe）, late diastolic peak strain rate （SRa）, the ratio of SRe/SRa were measured in the basal, middle and apical segments of right ventficular free wall in 75 healthy volunteers （age range： 21-71 y） by STI from the apical 4-chamber view. RV longitudinal strain and strain rate were highest in the basal segment of the free wall. Older subjects had lower early diastolic strain rate （SRe） than younger subjects, but they had higher late diastolic strain rate （SRa）. A negative correlation between age and the ratio of SRe/SRa was found in all RV free wall segments （r=-4）.466 - -0.614, P〈0.01）. It is concluded that RV diastolic strain rate changes with age and STI can be used for the study of RV myocardial deformation.
文摘目的:运用核素肺灌注显像对血压正常伴右室功能不全的急性肺栓塞患者溶栓治疗前后肺血流灌注进行观察和定量分析,为临床疗效评价提供准确和直观的客观依据。方法:36例急性肺栓塞患者分为溶栓组和抗凝组,在治疗前后均行肺灌注显像。应用半定量法计算全肺灌注缺损百分数(percentage of pulmonary defect score,PPDs)和灌注改善百分数(percentage of pulmonary improve score,PPIs)。治疗前、治疗后7～10d及25～30d的PPDs分别记为PPDsD0、PPDsD10和PPDsD30。各组PPDsD0与PPDsD30之差、PPDsD0与PPDsD10之差、PPDsD10与PPDsD30之差分别记为PPIs、PPIsI1、PPIsI2。结果:溶栓组、抗凝组PPDs在治疗后均随时间显著降低(P<0.001);溶栓组PPIsI1明显大于抗凝组;两组PPIsI2无明显差异。在整个观察期间(治疗后1个月),溶栓组PPIs明显大于抗凝组。结论:溶栓治疗较单抗凝治疗能够更加迅速而持续地改善肺栓塞患者的肺血流灌注,应用肺灌注显像可以准确地评价患者治疗前后的肺血流变化。
