摘要
目的:运用速度向量成像(VVI)技术评价心肌梗死患者左心室壁节段心肌运动的同步性。方法:对15例正常人和8例心肌梗死患者进行VVI,测量左心室局部心肌纵向运动达峰时间(TL-V)及径向运动达峰时间(TR-V),计算纵向、径向运动达峰时间差(T-SD)及最早与最迟达峰时间标准差(T-MX)。结果:①正常心脏各节段间TL-V及TR-V差异无统计学意义。②心肌梗死节段TL-V、TR-V较非梗死节段及对照组显著延长(P<0.05);与对照组比较,心肌梗死组纵向运动T-SD和T-MX、径向运动T-SD和T-MX均显著增大(均P<0.05)。结论:VVI技术有望成为评价心肌梗死患者左心室壁非同步性运动及判断梗死节段的有效方法。
Objective:The assess ment of left ventricular contraction asynchrony in patients with myocardial infarction was given by using velocity vector imaging(VVI)technology.Method:by VVI in 15 healthy volunteers and 8 patients with myocardial infarction,the dynamic high frame rate B-mode images were acoustically acquired.The time to peak radial systolic velocity(TR-V)was measured in SAX views;the time to peak longitudinal systolic velocity(TL-V)was measured in apical views.The standard deviation of TR-V and TL-V(T-SD)was measured,and the deviation of the earliest and the latest TR-V and TL-V(T-MX)was also measured.Result:①There were no difference between TL-V and TR-V in healthy volunteers.②In patients with myocardial infarction,TL-V and TR-V of the infarcted segments were longer significantly than that in the non-infarcted segments and in the healthy volunteers.The longitudinal T-SD,T-MX and the radial T-SD,T-MX in infarcted patients were increased compared with the healthy volunteers.Conclusion:VVI could be used in to assess the left ventricular contraction asynchrony in patients with myocardial infarction and the select ation of infracted segments.
出处
《临床心血管病杂志》
CAS
CSCD
北大核心
2007年第12期887-890,共4页
Journal of Clinical Cardiology
关键词
超声心动描记术
心肌梗死
速度向量成像
Echocardiography
Myocardial infarction
Velocity vector imaging
