Abstract:

BACKGROUND: The traditional CT is hard to be popularized in follow-up after the treatment of coronary heart disease with interventional stents, looking for noninvasive and effective method to evaluate the stent restenosis has became the hot spot.
OBJECTIVE: To investigate the diagnosis value of dual-source CT coronary angiography in detecting coronary-stent restenosis through the comparing the evaluative effect of dual-source CT coronary angiography and selective coronary angiography without heart rate control.
METHODS: The 53 cases with a total of 75 stents were performed with dual-source CT coronary angiography and coronary angiography to evaluate image quality and analyze sensitivity of coronary-stent restenosis.
RESULTS AND CONCLUSION: ①All stents were considered assessable for diagnosis with dual-source CT angiography. Images quality of 96% (72/75) of the stents was good. ②There was no significant difference in sensitivity, specificity, positive and negative predictive value and the accuracy between dual-source CT angiography diagnose in-stent restenosis and coronary angiography diagnose in-stent restenosis (P > 0.05). ③There was no significant difference in sensitivity, specificity, positive and negative predictive value and the accuracy between the patients with the heart rate < 70 beats/min and ≥ 70 beats/min receiving dual-source CT angiography diagnosis for in-stent restenosis (P > 0.05). ④The dual-source CT angiography had lower sensitivity, specificity, positive and negative predictive value and accuracy to detect < 3.0 mm in-stent restenosis than to detect ≥ 3.0 mm in-stent restenosis (P < 0.05). The dual-source CT is helpful for the evaluation of coronary in-stent restenosis without heart rate control, and it can be used as the large-diameter stent patency assessment method and small-diameter stent preliminary screening method.