ST／HR斜率联合ST段标准诊断介入术后再狭窄的研究

The association of ST/HR slope and ST segment depression in exercise test to evaluate restenosis after PCI

目的通过探讨心电图运动试验测定ST／HR斜率联合常规ST段标准诊断冠心病介入术后再狭窄的敏感性和特异性。方法自2001年11月至2003年12月,对成功行冠脉介入治疗(PCI)的129例患者,在术后3-6个月进行随访,测量心电图运动试验ST／HR斜率及常规ST段阳性标准联合诊断再狭窄,通过冠状动脉造影确定有无再狭窄,评价其诊断再狭窄的价值。结果ST／HR斜率联合常规ST段应用诊断再狭窄的敏感性和特异性分别为42．5％、97．4％,特异性高于传统ST段标准(66．7％),P<0．05。结论ST／HR斜率联合常规ST段标准可作为诊断再狭窄的无创手段。

Objective To evaluate the sensitivity and specificity of ST/HR slope at the end of ECG exercise test plus ST segment depression on diagnosing restenosis after PCI. Methods 129 patients who undergoing PCI successfully 3 ~ 6 months before were involved. Treadmill exercise test and ST/HR slope were measured just at the end of exercise test. All patients also accepted coronary angiography to be confirmed whether he/she had restenosis.The results of ST/HR slope plus ST segment depression was evaluated. Results The sensitivity and specificity of ST/ HR slope plus ST segment depression were 42.5% and 97.4% respectively.The specificity of ST/HR slope plus ST segment depression was significant higher than conventional ST - segment depression standard (66.7%), P < 0.05.Conclusion Measuring ST/HR slope at the end of ECG exercise test plus ST segment depression can be used for diagnosing restenosis after PCI.