摘要
目的应用应变率及应变成像技术观测正常中老年人左、右室壁的应变率及应变。方法测量30例正常中老年人各室壁、各节段收缩期、舒张早期和房缩期纵向应变率(SRs、SRe、SRa)及最大应变(Smax)。结果①各室壁峰值SR。SRs:前间隔低于除左室侧壁外的其他室壁,右室侧壁高于左室各壁;SRe:前间隔、后间隔低于其他室壁,后壁高于其他室壁;SRa:前间隔、后壁、前壁及侧壁低于其他室壁(均P<0.05),余室壁间差异无显著性意义。②各水平峰值SR:SRs、SRe和SRa基底部高于中部及心尖部(均P<0.05),中部与心尖部无明显差异。③各室壁平均Smax:左室侧壁低于后间隔、右室侧壁(P<0.05),余室壁间差异无显著性意义;不同水平室壁之间差异无显著性意义。结论SRI、SI能够定量分析局部心肌的舒缩变形能力,是一种临床无创评价局部心肌功能的新方法。
Objective To detect the strain rate （SR） and strain of left ventricle （LV） and right ventricle （RV） in healthy middle and old people using strain rate imaging （SRI）, and strain imaging （SI）. Methods Thirty healthy subjects were enrolled in the study. Longitudinal SR of LV walls and RV wall during systole, early diastole and atrium contraction （SRs, SRe and SRa） and largest strain （Smax） were measured. Results ①Longitudinal crest-value SR of each wall： SRs of the anterior interventricular septum （AS） was lower than those of other walls except for LV lateral wall （LW）, while SRs of RV latera （RW） wall larger than those of other walls. SRe of interventricular septum （IVS） and AS were lower than those of other walls, SRe of posterior wall （PW） larger than those of other walls. SRa of AS, PW, anterior wall （AW） and LW were lower than those of other walls（P〈0. 05）. There were no significant difference between other walls. ②SRs,SRe and SRa on each level of the base were higher than the mid as well as the apex（P〈0. 05）, while the differences between the mid and the apex were not significant. ③Mean Smax of each wall： mean Smax of LW was lower than IVS and RW, but no significant difference was found on other walls. There was no significant difference on various levels of walls. Conclusion SRI and SI can be used to analyze quantitatively the myocardial deformation of longitudinal direction, which is a new technique for evaluating regional myocardial function noninvasively and accurately.
出处
《中国医学影像技术》
CSCD
北大核心
2006年第5期705-707,共3页
Chinese Journal of Medical Imaging Technology
关键词
超声心动描记术
应变率
应变
心肌
左心室功能
Echocardiography
Strain rate
Strain
Myocardium
Left ventricular function
