MSCTA结合心肌首过灌注成像诊断冠状动脉狭窄

目的探讨MSCT血管造影(MSCTA)结合心肌首过灌注成像诊断冠状动脉狭窄的价值。方法对80例可疑冠心病患者行64排MSCTA检查,按MSCTA成像质量分为A组(n=41,血管显示清晰)和B组(n=39,血管显示不清);以CAG结果为金标准,计算并比较MSCTA和MSCTA结合心肌首过灌注成像诊断冠状动脉狭窄的准确率。结果A组中MSCTA诊断冠状动脉狭窄准确率[85.98%(141/164)]高于MSCTA结合首过灌注成像[80.49%(132/164)],B组中MSCTA诊断冠状动脉狭窄准确率[66.03%(103/156)]低于MSCTA结合首过灌注成像[79.49%(124/156)],差异均有统计学意义(P均0.05)。结论 MSCTA诊断冠状动脉狭窄时,对于血管显示不清者,结合心肌首过灌注成像能明显提高诊断准确率。

MSCT angiography combined with CT first-pass perfusion of myocardium in diagnosis of coronary artery stenosis

Objective To evaluate the ability of MSCT angiography (MSCTA) combined with CT first-pass perfusion of myocardium in diagnosis of coronary artery stenosis. Methods Eighty patients with suspected coronary artery disease underwent 64-slice MSCTA. According to imaging quality, the patients were divided into group A (n=41) with clear vessels displayed and group B (n=39) with unclear vessels displayed. The accuracy rate of MSCTA and MSCTA combined with CT first-pass perfusion of myocardium were calculated and compared taking coronary angiography(CAG) as gold standards. Results In group A, the accuracy rate of MSCTA (85.98% [141/164]) in diagnosis of coronary artery stenosis was significantly higher than that of MSCTA combined with CT first-pass perfusion of myocardium (80.49% [132/164], P<0.05). In group B, the accuracy rate of MSCTA (66.03% [103/156]) in diagnosis of coronary artery stenosis was lower than that of MSCTA combined with CT first-pass perfusion of myocardium (79.49% [124/156], P<0.05). Conclusion The accuracy rate of MSCTA in diagnosing coronary artery stenosis can be improved significantly through combination with CT first-pass perfusion of myocardium when the images of vessels are unclear.