| 彭国球,陈宁,胡毅,段凯,张奇,许梓童.心率-时间曲线在64层CT冠状动脉成像中的价值[J].中国医学影像技术,2011,27(9):1825~1828 |
| 心率-时间曲线在64层CT冠状动脉成像中的价值 |
| Value of heart rate-time curve in 64-slice CT coronary angiography |
| 投稿时间：2011-03-03 修订日期：2011-05-23 |
| DOI： |
| 中文关键词: 心率 冠状血管 体层摄影术,X线计算机 |
| 英文关键词:Heart rate Coronary vessels Tomography, X-ray computed |
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| 中文摘要: |
| 目的 探讨心率-时间曲线在CT冠状动脉成像(CTCA)中的价值及临床应用。 方法 选取拟接受CTCA检查患者400例,分为A、B两组,每组200例。A组在扫描前5 s吸气屏气;B组根据训练时的心率-时间曲线,选取屏气后心率最佳时间进行扫描。心率在吸气屏气后随时间变化的规律分为下降型、平稳型、上升型及上升后下降型。统计并比较B组患者训练时和扫描时的曲线分布,A、B两组扫描时的心率波动和扫描开始时的心率;评价并比较A、B两组冠状动脉节段图像质量优良率。 结果 B组训练时与扫描时比较,患者心率-时间曲线分布差异无统计学意义(χ2=0.751,P>0.05)。B组扫描时心率低于A组(t=3.523,P<0.01),心率波动小于A组(t=4.417,P<0.01)。A组冠状动脉节段图像质量优良率82.08%(2134/2600),B组为88.19%(2293/2600)(χ2=3.82,P<0.01)。 结论 利用训练时的心率-时间曲线可以优化扫描;利用心率-时间曲线可以在扫描时有效控制心率,减少心率波动,提高CTCA的成像质量。 |
| 英文摘要: |
| Objective To observe the value of heart rate-time curve in coronary CT angiography (CTCA) and its clinical applications. Methods Four hundred patients who would undergo CTCA were divided into 2 groups (group A and B, each n=200). In group A, scanning started at 5 s after breath-hold.In group B, scanning began at the best heart rate after breath-hold, based on heart rate-time curve during training. Heart rate variations with time after breath-hold were divided into 4 types: Decreased-type, stable-type, increased type, increased and then decreased type. The curves distribution of patients in training and scanning in group B were statistically analyzed and compared, as well as the heart rate and the heart rate fluctuations during scanning in group A and B. The imaging quality of CTCA in groups A and B were evaluated and compared. Results In group B, no statistical difference of the distribution of heart rate-time curves between training and scanning was found (χ2=0.751, P>0.05). Heart rates in group B were lower than that in group A (t=3.523, P<0.01). Heart rate fluctuations were significantly less in group B than in group A (t=4.417, P<0.01). For good and excellent rates of CTCA imaging quality, group A was 82.08% (2134/2600), group B was 88.19% (2293/2600) (χ2=3.82,P<0.01). Conclusion Heart rate-time curve in training could be used to optimize the scanning. The use of heart rate-time curve is effective in controlling heart rate during scanning, reducing the heart rate fluctuations and improving the imaging quality of CTCA. |
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