JACC Cardiovasc Imag:冠状动脉疾病的诊断预测模型

2018-03-09 国际循环编辑部 国际循环

已发表的冠状动脉疾病(CAD)3种预测模型对于美国伴有阻塞性CAD的胸痛患者,预测价值如何?近期发表的一项最新研究就此问题进行了探讨。

已发表的冠状动脉疾病(CAD)3种预测模型对于美国伴有阻塞性CAD的胸痛患者,预测价值如何?近期发表的一项最新研究就此问题进行了探讨。

研究者对PROMISE研究中4996例接受计算机断层扫描血管造影术(CTA)或有创冠状动脉造影(ICA)检查的患者中3468例存在稳定胸痛的患者进行分析。研究者推测若CTA显示无狭窄且冠状动脉钙化(CAC)评分为0,则ICA检查无阻塞性CAD;并根据临床变量及CTA结果推算缺失的ICA结果。根据已发表的3种模型(以年龄、性别及胸痛类型为依据的基础模型,在基础模型基础上进一步涉及糖尿病高血压、血脂异常及吸烟状况的临床模型以及临床+CAC评分模型)的系数计算CAD的预测概率。



受试患者的平均年龄为60岁,女性共计有1805例,CTA显示存在阻塞性CAD者共计779例(23%)。分析发现,基础模型、临床模型及临床+CAC评分模型对于CAD具有良好的鉴别能力,所对应的C统计值分别为0.69(95%CI:0.67~0.72)、0.72(95%CI:0.69~0.74)和0.86(95%CI:0.85~0.88)。校准分析显示,与预期相比,典型的胸痛及糖尿病的预测价值相对较差,但CAC评分的预测价值则相对更好。具体来说,对31%经临床模型预测发生CAD概率较低(≤10%)患者的分析显示,其实际CAD患病率为7%;对48%的经临床+CAC评分模型预测发生CAD风险较低患者的分析显示,其实际患病率仅为2%。除外缺失数据后的敏感性分析显示,以CTA结果为结局时所获得的结果相似,但对于行ICA的患者,预测模型显著低估CAD风险。

综上可见,现有临床预测模型可识别阻塞性CAD发生概率较低的患者。尽管与预期相比,某些预测因素如胸痛类型及糖尿病的预测价值相对较差、CAC评分的预测价值相对较好,但CAD预测模型对于PROMISE研究中的患者还是具有相对比较准确的预测价值,故可用于评估拟行无创影像学检查的慢性稳定心绞痛患者发生CAD的概率或风险。总之,CAD临床预测模型具有良好的预测价值,有助于帮助临床医生识别CAD风险较低的患者。鉴于该研究主要分析中有关ICA的结果很多依靠的是估算数据,故未来有必要进一步开展研究对其结果进行验证。

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    2018-09-22 quxin068
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    2018-03-10 changjiu

    学习了.谢谢

    0

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2017年7月25日在线发表于《JAMA》杂志的一项研究显示,对于易感体质人群而言,高血钙水平与冠状动脉心脏病和心肌梗死风险相关。

EUR RADIOL:利用自导航自由呼吸全心磁共振血管成像在先天性心脏病冠状动脉评估的价值

心的形状如一倒置的、前后略扁的圆锥体,如将其视为头部,则位于头顶部、几乎环绕心脏一周的冠状动脉恰似一顶王冠,这就是其名称由来。冠状动脉是供给心脏血液的动脉,起于主动脉根部,分左右两支,行于心脏表面。采用Schlesinger等的分类原则,将冠状动脉的分布分为三型: 1、右优势型;2、均衡型;3、左优势型。本研究旨在评价自导航自由呼吸3D(SNFB3D)全心MRA技术在评估先天性心脏病(CHD)冠状