[摘要]目的 探讨心电向量图运动试验前后QRS环时间对冠心病辅助诊断价值。方法 选择行冠状动脉造影术的91例确诊或疑诊冠心病病人，在术前2 d内行心电向量图运动试验，测量运动前后QRS环时间的改变，并与冠状动脉造影的结果进行对比分析。结果 冠心病组运动后QRS环时间延长，而冠状动脉造影正常组运动后QRS环时间缩短，两组QRS环时间变化均在运动后即刻最为显著。用BAZETT公式校正的QRS环时间，无论是冠心病组还是冠状动脉造影正常组，运动后均延长，其中以冠心病组延长为著( t=20.2，P <0.01)。结论 心电向量图运动后QRS环时间改变，可在ST段等指标的基础上提高对冠心病诊断的准确性;心电向量图QRS环时间测算容易，重复性好，值得在临床推广。

    [关键词] 冠状动脉疾病;ORS环时间改变;向量心电描记术;心脏功能试验;冠状动脉造影

    SIGNIFICANCE OF THE CHANGES IN QRS LOOP DURATION AFTER THE TREADMILL EXERCISE TEST IN THE DIAGNOSIS OF CORONARY HEART DISEASE

    PANG SHI-MIN， YU XIAO-LIN， WU JING

    (Lab of Encephalic Ultrasonography， Qingdao Hiser Medical Center， Qingdao 266033， China)

    [ABSTRACT]ObjectiveTo assess the significance of changes in QRS loop duration after the treadmill exercise test with continuous vectorcardiogram monitoring in the diagnosis of coronary heart disease. MethodsTreadmill exercise tests were con-ducted on patients with coronary heart disease (group A) and suspected cases (group B; total n =91) for two days， followed by coronary arteriography. Continuous monitoring of the vector-cardiogram was performed during the exercise ......