Arab D, Valeti V, Schünemann H J, López-Candales A
Department of Medicine, Social and Preventive Medicine, The Buffalo General Hospital, SUNY at Buffalo, 14203, USA.
Am J Cardiol. 2000 Mar 15;85(6):764-6, A8. doi: 10.1016/s0002-9149(99)00858-9.
Prolongation of the QTc interval during stress testing predicts myocardial ischemia with a sensitivity of 88% and a specificity of 93%. Measurement of the QTc segment should be considered as an adjunctive electrocardiographic variable in the interpretation of stress tests and is even useful in patients who are not able to achieve the age-predicted target heart rate level.
应激试验期间QTc间期延长可预测心肌缺血,其敏感性为88%,特异性为93%。在解读应激试验时,应将QTc段测量视为一种辅助心电图变量,对于无法达到年龄预测目标心率水平的患者也很有用。