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Circulation:对于心力衰竭患者,合并肺动脉高压可促进其整体肺血管重构

2018-04-24 MedSci MedSci原创

Ahmed U. Fayyaz等人推测心力衰竭(HF)时肺静脉高压可导致肺静脉重构,而静脉重构的严重程度与HF时的肺动脉高压的严重程度相关。本研究共纳入108位合并PH(肺动脉收缩压[PASP]≥40mmHg)的HF患者(HF-PH;55位射血分数降低)和12位正常对照以及17位原发性肺静脉闭塞性疾病(PVOD)患者。通过活检(对照、HF-PH、7位PVOD)或手术(10位PVOD)获取肺组织样本

Ahmed U. Fayyaz等人推测心力衰竭(HF)时肺静脉高压可导致肺静脉重构,而静脉重构的严重程度与HF时的肺动脉高压的严重程度相关。

本研究共纳入108位合并PH(肺动脉收缩压[PASP]≥40mmHg)的HF患者(HF-PH;55位射血分数降低)和12位正常对照以及17位原发性肺静脉闭塞性疾病(PVOD)患者。通过活检(对照、HF-PH、7位PVOD)或手术(10位PVOD)获取肺组织样本,对样本的所有可分析的动脉(4949个)、静脉(7630)和不确定的小血管(IV,2168)进行定量组织形态检测以确定中肌层(动脉)和内膜(% IT)(动脉、静脉和IV)厚度相比血管直径的百分比。

HF-PH组的动脉中肌层的平均百分比(对照 6.9、HF-PH 11.0、PVOD 15.0)、动脉%IT(4.9、14.0、31.1)和IV %IT(10.6、25.8、50.0)均高于对照组(p均<0.0001),但低于PVOD组(p均≤0.005)。HF-PH组的PASP(mmHg)低于PVOD组(中位值 59[50-70] vs 91[82-103])。PASP与动脉内膜厚度百分比(r=0.41)和动脉%IT(r=0.35)相关,但与静脉 %IT(r=0.49)和IV % IT(r=0.55)的关联性更强(p均<0.0001)。根据动脉内膜厚度百分比和%IT校正后,PASP与静脉或IV %IT仍有显着关联,并且跟HF类型无关。在右心置管的患者(HF-PH 20位、PVOD 14位)中,跨肺压与肺血管重构之间存在类似的相关性,而且比静脉和IV %IT间的关联在数值上更强。尽管在右心室功能不全的HF-PH患者中,PASP稍高,但肺血管重构并不会更严重。肺血管重构的严重程度与肺弥散能力减退相关。

对于心衰患者,PH与整体肺血管重构相关,但PH的严重程度与静脉和小IV内膜厚度的关系更为明显,类似于在PVOD患者中观察到的现象。本研究发现拓展了我们对心衰患者肺动脉高压的病理生理的了解。

原始出处:

Ahmed U. Fayyaz,et al. Global Pulmonary Vascular Remodeling in Pulmonary Hypertension Associated With Heart Failure and Preserved or Reduced Ejection Fraction. Circulation. April 24,2018.https://doi.org/10.1161/CIRCULATIONAHA.117.031608

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    2018-04-24 明天jing

    肺动脉高压表面是罕见病,事实上临床上并不少见,治疗药物虽然有一些,但是整体仍然不理解,可能未来需要采用综合治疗措施。

    0

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    2018-04-24 183****7028

    学习

    0

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    2018-04-24 131****1460

    学习了受益匪浅

    0

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    2018-04-24 惠映实验室

    学习了.谢谢分享.

    0

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    2018-04-24 smartxiuxiu

    不错的文章

    0

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