EUR HEART J :严重主动脉狭窄者心肌纤维化程度评价

2017-07-26 MedSci MedSci原创

近日,在医学权威杂志EUR HEART J 上面发表了一篇研究文章,研究人员采用侵入性活检和无损成像学,旨在探讨严重的主动脉瓣狭窄(AS)患者的心肌纤维化(MF)。

近日,在医学权威杂志EUR HEART J 上面发表了一篇研究文章,研究人员采用侵入性活检和无损成像学,探讨了严重的主动脉瓣狭窄(AS)患者的心肌纤维化(MF)程度。

此研究纳入了133例严重的有症状的AS患者,其接受了主动脉瓣膜置换术,以及心血管磁共振(CMR)和晚期钆增强(LGE)和细胞外体积分数(ECV)量化。研究人员通过针或手术刀,在术中对患者进行了有(n = 53)/无(n = 80)心内膜的应变组织左心室(LV)活检,并与10个对照组比较。

心肌纤维化的发生主要有三种模式:(i)心内膜纤维化层增厚;(ii)显微镜下的瘢痕,肌层内膜较显着;(iii)弥漫性间质纤维化。与对照组相比,胶原蛋白体积分数(CVF)升高(P < 0.001),在含心内膜的样本中其含量更高(P < 0.001),而心内膜的CVF梯度下降(P = 0.001)。晚期钆增强与CVF有关(P < 0.001),但与ECV无关。LGE和ECV均独立于N-末端前脑钠肽和高敏感性肌钙蛋白T(P < 0.001)。高ECV也与更糟的LV重塑、左室射血分数和功能能力有关。结合高ECV和LGE较好地鉴别出不利的LV重塑、血液生物标志物和组织学参数,以及比单独参数更差的功能能力。

由此可见,严重AS患者的心肌纤维化程度复杂,但存在三种主要模式:心内膜纤维化、微瘢痕(主要为肌层内膜)和弥漫性间质纤维化。无论是组织学的CVF还是CMR参数ECV和LGE都不能完全捕获纤维化。可根据心肌胶原基质的反应,采用ECV联合LGE多参数方法对AS患者的心肌纤维化程度进行最佳分层。

原始出处

Thomas A. Treibel, Begona López, Arantxa González, et al. Reappraising myocardial fibrosis in severe aortic stenosis: an invasive and non-invasive study in 133 patients. EUR HEART J. 2017 July. 

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    2018-03-12 okhuali
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    2017-07-28 zhaojie88
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    2017-07-28 huagfeg
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    2017-07-28 slcumt

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