Evaluation and influencing factors of coronary CT angiography in acute coronary syndrome
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摘要: 目的 分析冠状动脉CT血管造影(CTA)对急性冠状动脉综合征(ACS)的诊断价值,探究影响CTA图像质量的因素。 方法 选取2020年8月—2022年9月于我院就诊的156例疑似ACS患者为研究对象,所有患者均行CTA检查,以冠状动脉造影(CAG)为金标准,分析CTA在ACS中的应用价值。将患者分为图像优良组(116例)、图像不佳组(40例),采用logistic回归分析其影响因素。 结果 156例疑似ACS患者,CAG诊断为ACS阳性106例、阴性50例,CTA诊断为ACS为104例、其他52例,CTA诊断ACS灵敏度为88.68%(94/106)、特异度为80.00%(40/50)、准确度为85.90%(134/156)。两种诊断方式在冠状动脉狭窄程度、斑块性质方面比较无显著差异。与图像优良组比较,图像不佳组屏气不理想、钙化、心律不齐占比更多(P<0.05)。Logistic回归分析显示屏气不理想、钙化是CTA图像质量的影响因素(P<0.05)。 结论 CTA在ACS诊断中有一定临床参考价值,屏气不理想、钙化是影响图像质量的因素。Abstract: Objective To analyze the diagnostic value of coronary CT angiography(CTA) in acute coronary syndrome(ACS) and explore the factors affecting the image quality of CTA. Methods A total of 156 patients with suspected ACS who were treated in our hospital from August 2020 to September 2022 were selected. All patients underwent CTA examination, and coronary angiography(CAG) both. The patients were divided into good image group(116 cases) and poor image group(40 cases), and the influencing factors were analyzed by logistic regression. Results Among 156 suspected ACS patients, CAG was diagnosed as positive in 106 cases, negative in 50 cases, and CTA was diagnosed as ACS in 104 cases and other 52 cases. The sensitivity of CTA in diagnosing ACS was 88.68%(94/106), specificity was 80.00%(40/50), and accuracy was 85.90%(134/156). There was no significant difference between the two diagnostic methods in the degree of coronary artery stenosis and the nature of plaque. Compared with the good image group, there were more unsatisfactory breath holding, calcification and arrhythmia in the poor image group(P < 0.05). Logistic regression analysis showed that unsatisfactory breath holding and calcification were the influencing factors of CTA image quality(P < 0.05). Conclusion CTA has a certain clinical reference value in the diagnosis of ACS. The factors that affect the image quality are unsatisfactory breath holding and calcification.
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Key words:
- acute coronary syndrome /
- CT angiography /
- coronary angiography /
- image quality /
- influencing factor
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表 1 CTA诊断效能分析
Table 1. Analysis of diagnostic efficiency of CTA
例 检查方式 检查结果 CAG 合计 阳性 阴性 CTA 阳性 94 10 104 阴性 12 40 52 合计 106 50 156 表 2 CTA和CAG诊断冠脉狭窄程度分析
Table 2. Analysis of the degree of coronary stenosis diagnosed by CTA and CAG
例 检查方式 例 通畅 轻度狭窄 中度狭窄 重度狭窄 CAG 156 50 35 41 30 CTA 156 52 37 37 30 Z值 -0.308 P值 0.758 表 3 CTA和CAG诊断斑块性质分析
Table 3. Analysis of plaque properties diagnosed by CTA and CAG
例 检查方式 例 Ⅰ型 Ⅱ型 Ⅲ型 CAG 106 30 30 46 CTA 104 28 31 45 Z值 -0.092 P值 0.926 表 4 CTA不同图像质量诊断效能比较
Table 4. Comparison of diagnostic efficiency of CTA with different image quality
例 图像质量 CTA检查结果 CAG 合计 阳性 阴性 图像优良 阳性 82 3 85 阴性 5 26 31 图像不佳 阳性 17 7 24 阴性 7 9 16 合计 111 45 156 表 5 CTA不同图像质量诊断特异度、灵敏度、准确度比较
Table 5. Comparison of diagnostic specificity, sensitivity and accuracy of CTA with different image quality
图像质量 例 特异度/% 灵敏度/% 准确度/% 图像优良 116 89.7(26/29) 94.3(82/87) 93.1(108/116) 图像不佳 40 56.3(9/16) 70.8(17/24) 65.0(26/40) χ2值 6.657 10.700 19.393 P值 0.010 0.001 <0.001 表 6 CTA图像优良与图像不佳组比较
Table 6. Comparison of CTA group with good image and poor image
例(%) 指标 图像优良组(116例) 图像不佳组(40例) χ2 P 性别 2.710 0.100 男 55(47.4) 25(62.5) 女 61(52.6) 15(37.5) 年龄 0.543 0.461 >60岁 96(82.8) 31(77.5) ≤60岁 20(17.2) 9(22.5) 屏气不理想 36(31.0) 23(57.5) 8.859 0.003 钙化 30(25.9) 20(50.0) 7.957 0.005 心律不齐 39(33.6) 21(52.5) 4.479 0.034 造影剂充盈不佳 38(32.8) 19(47.5) 2.787 0.095 表 7 影响CTA图像质量的二元logistic回归分析
Table 7. Binary logistic regression analysis affecting CTA image quality
变量 B S.E. Wald 自由度 P OR 95%CI 屏气不理想 0.926 0.392 5.568 1 0.018 2.524 1.170~5.448 钙化 0.886 0.396 5.016 1 0.025 2.426 1.117~5.269 心律不齐 0.505 0.395 1.634 1 0.201 1.657 0.764~3.594 常量 -2.019 0.343 34.656 1 <0.001 0.133 -
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