论文部分内容阅读
目的采用超声组织二尖瓣环位移技术(TMAD),评价冠状动脉慢血流患者(SCF)的左心室收缩功能,探讨其临床应用价值。方法临床诊断为SCF的患者61例(SCF组),采用超声心动图检测左心室射血分数(LVEF)、二尖瓣环室间隔位点位移(TMAD1)、侧壁位点位移(TMAD2)、平均位移(TMAD Midpt)和平均位移率(TMAD Midpt%),并与60例健康成年人(对照组)比较。结果 (1)与对照组比较,SCF组TMAD1、TMAD2、TMAD Midpt和TMAD Midpt%均减低(P<0.05),但LVEF无显著变化;(2)TMAD各参数均与LVEF呈正相关(r=0.20、0.26、0.29、0.24,P<0.05);(3)TMAD各参数与年龄、心率无相关(P>0.05),TMAD1、TMAD2、TMAD Midpt与左室舒张末容积(LVEDV)呈正相关(r=0.19、0.20、0.25,P<0.05),而TMAD Midpt%与LVEDV无相关(P>0.05)。结论冠状动脉慢血流患者左心室收缩功能减低。TMAD参数中TMAD Midpt%不受左心室容积影响,是可简便、准确、灵敏评价左心室收缩功能的新指标。
Objective To assess the clinical value of left ventricular systolic function in patients with chronic coronary artery disease (SCF) by using the TMAD technique. Methods Sixty-one SCF patients (SCF group) were enrolled in this study. Left ventricular ejection fraction (LVEF), mitral annular site displacement (TMAD1), lateral wall site displacement (TMAD2) The mean shift (TMAD Midpt) and average shift (TMAD Midpt%) were compared with 60 healthy adults (control group). Results (1) TMAD1, TMAD2, TMAD Midpt and TMAD Midpt% in SCF group were decreased (P <0.05), but no significant changes in LVEF were found in SCF group. (2) TMAD parameters were positively correlated with LVEF , 0.26,0.29,0.24, P <0.05). (3) There was no correlation between the TMAD parameters and age and heart rate (P> 0.05). TMAD1, TMAD2 and TMAD Midpt were positively correlated with left ventricular end diastolic volume (LVEDV) 0.19,0.20,0.25, P <0.05), while TMAD Midpt% had no correlation with LVEDV (P> 0.05). Conclusions Left ventricular systolic function is reduced in patients with coronary arterial slow flow. TMAD parameters TMAD Midpt% is not affected by left ventricular volume, is a simple, accurate and sensitive evaluation of new indicators of left ventricular systolic function.