QTVI对冠心病缺血节段心肌收缩运动的研究

目的 探讨QTVI技术对冠心病不同节段心肌收缩运动状况进行定量评估的应用价值。方法 依冠状动脉造影结果将31名患者分为两组，正常组（冠脉造影阴性）10例，冠脉病变组（冠脉造影阳性）21例。结合同步心电图，在TVI模式下采集心尖四腔，心尖两腔，心尖左室长轴切面动态图像，取样左室前壁、下壁、前间隔、后壁、侧壁和室间隔之基底段、中段共12个节段测量心电图R波顶点至QTVI曲线收缩峰值速度的时间（TR-PV），比较两组之间该指标的差异。结果 正常组及冠脉病变组相同室壁的基底段与中段TR-PV均未见显著差异（P〉0．05）；冠脉病变组心肌节段TR-PV与正常组相比，前壁、后壁的基底段与中段差异有显著性（P〈0．05），而侧壁的基底段与中段差异也具有显著性（P〈0．01）。结论冠心病缺血节段心肌收缩运动存在失同步化，TR-PV是对冠心病缺血节段心肌的收缩运动功能失常进行客观定量评价的有效指标。

QTVI Study of Ischemia-related Regional Myocardial Asynchrony in Systolic

Objective To assess the ischemia-related regional myocardial asynchrony in systolic using quantitative tissue velocity imaging.Methods Thirty-one patients were divided into 2 groups by coronary angiography:10 patients in normal group and 21 patients in coronary artery disease group(CAD group).Twelve nonapical segments were acquired through 3 apical views using tissue dopller imaging.The period from electrocardiographyic R wave to the peak contraction velocity(T_(R-PV)) on 12 nonapical segments was measured.Results T_(R-PV) of basal and middle segmens in the same wall had no significant difference no matter in which groups(P>0.05).T_(RPV) of basal&mid-anterior,basal&mid-posterior and basal&mid-lateral in CAD group had delay comparing with those in normal group(P<0.05),especially of basal&mid-lateral.Conclusion QTVI technique provides objective quantitative information for indentification of coronary artery stenosis in the patients with systolic asynchrony.