【摘要】 目的应用心肌声学造影评价心脏X综合征患者的价值。方法选取心脏X综合征50例患者与29例正常人经心肌声学造影(MCE)的同时应用超声心动图得到以下参数:造影剂峰值密度(A)、心肌血流速率β、心肌血流容积(MBF MBF=A×β)左室舒张末期内径LVEDD(mm)、左室收缩末期内径LVESD(mm)、射血分数EF(%)、舒张早期峰值血流速度E(cm/s)、舒张晚期峰值血流速度A(cm/s)、舒张早期峰值血流速度与舒张晚期峰值血流速度比值E/A、舒张早期血流延迟时间Dt(ms)。采用定量分析的方法利用统计学方法对相应节段的心肌灌注情况和心脏功能与正常对照组进行比较。结果与正常对照组比较,X综合征组β及MFB均显著下降,心脏超声心动图在LVEDD、LVESD、EF、E、A、E/A、Dt,无明显差别。结论心脏X综合征组患者较正常人血流速度减慢的基础上存在着微循环的损伤,但是并没有导致心脏收缩舒张功能异常。MCE可为心脏X综合征的诊断提供新的诊断依据。更多还原

【Abstract】 Objective To evaluate cardic X syndrome patients with myocardial contrast echocardiography(MCE) Methods 50 cardiac X syndrome patients and 29 normal cases were selected.These parameters such as peak video intensity(A),myocardial microbubble velocity(β),myocardial blood flow(MBF MBF=A×β),left ventricle end-diasto le diameter LVEDD(mm),left ventricle end-systole diameter LVESD (mm),ejection fraction EF(%),mitral annular early diastole inflow velocities E(cm/s)and late diastole inflow velocities A(cm/s),the rate E/A,E deceleration time Dt (ms) were gained in the two groups.Results There was no significant difference in LVEDD,LVESD,EF,E,A,E/ A and Dt.But in cardiac X syndrome group.β and MBF descended more largely than those in normal group. Conclusions MCE can evaluate regional myocardial perfusion and microcirculation.In patients with cardiac X syndrome blood flow velocity may decrease with microcirculation damage but cardiac function keeps normal.MCE shows a new diagnosis way for cardiac syndrome.更多还原