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目的 探讨全心尖切面心肌背向散射积分参数评价心肌缺血的可靠性。方法 分析 22例冠心病 (CAD)患者和 18例冠状动脉定量造影(QCA)正常患者的全心尖切面心肌所测左室 16个节段背向散射积分参数,分别比较CAD组中室壁运动异常节段心肌、室壁运动正常节段心肌及对照组心肌的CVIB、CVIB%及AII%值。结果 CAD组中室壁运动异常节段心肌CVIB、CVIB%值均显著低于后二者,而AII%值则显著高于后二者。结论 全心尖切面所测左室 16个节段背向散射积分参数能够敏感、客观并比较全面地反映心肌缺血情况。
Objective To investigate the reliability of myocardial ischemia by using the integrated cardiac backscatter parameters of the whole heart section. Methods The parameters of backscatter of left ventricular segment were measured in 22 patients with coronary heart disease (CAD) and 18 patients with normal coronary angiography (QCA). The parameters of CAD in CAD group were compared The CVIB, CVIB% and AII% values of myocardial segments in the segmental myocardium, normal segmental myocardium and the control group were observed. Results The CVIB and CVIB% of myocardial infarction in CAD group were significantly lower than those in the latter two groups, while the AII% was significantly higher in the CAD group than in the latter two groups. Conclusion The integral parameters of backscatter in the 16 segments of left ventricular measured by the apical section can be sensitive, objective and more completely reflect the myocardial ischemia.