Abstract：Objective To analyze the diagnostic values of QT dispersion(QTd) and changes of ST segment for coronary heart disease during treadmill exercise test(TET).MethodsThe changes of QTd and ST segment were obseved in 158 patients diagnosed with coronary heart disease by coronary arteriongraphy and 96 controls whose TET results were negative.ResultsCompared with the controls, QTds of the patients with coronary heart disease were significantly increased(P<0.05) and the increase was correlative with ST segment depression.The diagnostic accuracy of QTd≥60 ms for coronary heart disease was higher than that of ST segment. ConclusionThe changes of QTd during TET can be utilized as a new index in diagnosing and treating coronary heart disease.
2013, Vol. 22 
