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Neurology:脑淀粉样血管病患者中,有腔梗者更易出现脑出血

2021-04-10 Freeman MedSci原创

脑淀粉样血管病患者中,有腔梗者更易出现脑出血

散发性脑淀粉样血管病(Sporadic cerebral amyloid angiopathy,CAA)是老年人常见的小血管疾病,病理特点是β淀粉样蛋白在皮质和软网膜血管中堆积。

CAA可导致脑叶内出血(ICH)、和脑叶微出血(CMBs)、以及白质高信号病变(WMH)、皮质脑微梗死(CMIs)等缺血性病变。腔梗(lacune),病理上定义为动脉穿支闭塞导致的小梗塞,在脑小血管疾病患者中也很常见。

最近研究表明,与高血压深部ICH(HTNICH)患者相比,位于脑叶区域的lacune在CAA相关ICH患者中更为常见。腔梗(lacune)和CMIs是散发的脑部病变,可能与缺血有关,但在CAA患者中尚未研究其关联性和机制。潜在的机制可能包括散发的微小血管闭塞或CAA中的全局性血管功能障碍; 后者可以使用从fMRI获得的血氧水平依赖性(BOLD)信号进行量化。

藉此,哈佛大学的Elif Gokcal等人,探究了腔梗与皮质脑微梗死(CMIs)的关系,评估其与血管功能障碍的关系,并研究其对脑淀粉样血管病(CAA)发生脑内出血(ICH)风险的影响。

在这项研究中,他们假设:lacune和CMIs有相似的机制,因此CAA伴有lacune的患者更可能有CMIs。

此外,血管功能障碍是CAA中全局性脑缺血的主要贡献者,但与lacune和CMI的形成无关,并认为这主要是由于局灶性血管病变所致。

最后,探讨了腔梗的存在对CAA患者ICH事件风险的潜在影响。

他们利用了前瞻性注册的CAA队列中,回顾性地分析了腔梗(深部/脑叶)、CMIs和WMH体积的数量和地形,该队列接受了高分辨率MRI。在多变量模型中评估了腔梗与CMIs和其他CAA相关标志物的关系,包括血氧水平依赖性信号达到峰值(TTP)的时间。最后通过Cox回归模型用于研究腔梗和ICH事件之间的关系。

他们纳入了122名无痴呆的可能CAA(probable CAA)患者(平均年龄69.4±7.6岁)。31例患者(25.4%)存在腔梗,除一例外,其余均位于脑叶区域。

与无腔梗的患者相比,有裂隙的患者皮质CMIs更常见(51.6% vs 20.9%,p = 0.002)。TTP与裂隙或CMI无关(均P>0.2),但较长的TTP反应与较高的WMH体积独立相关(P=0.001)。

在单变量和多变量Cox回归模型中,腔梗与ICH风险增加相关(分别为p = 0.048和p = 0.026)。

这个在CAA中的研究,重要意义在于发现了,CAA 中脑叶腔梗的发病率很高,经常与CMIs共存,提示这2种病变类型可能是CAA相关梗死共同谱系的一部分。腔梗与血管功能障碍无关,但可预测ICH的发生,会导致严重的局灶性血管受累,而不是全局性缺血作为其机制。


原文出处:

Lacunes, Microinfarcts, and Vascular Dysfunction in Cerebral Amyloid Angiopathy
Elif Gokcal, Mitchell J. Horn, Susanne J. van Veluw,et al.
Neurology Mar 2021, 96 (12) e1646-e1654; DOI: 10.1212/WNL.0000000000011631

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    2021-12-29 yinhl1978
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    2021-04-10 ms1000001799055092

    学习一下

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=2046677, encodeId=511920466e70e, content=<a href='/topic/show?id=9b708491280' target=_blank style='color:#2F92EE;'>#脑淀粉样#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84912, encryptionId=9b708491280, topicName=脑淀粉样)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=dab8203, createdName=zsyan, createdTime=Sat Apr 17 07:15:48 CST 2021, time=2021-04-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1644882, encodeId=91591644882a6, content=<a href='/topic/show?id=e3eb89e17fb' target=_blank style='color:#2F92EE;'>#血管病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89717, encryptionId=e3eb89e17fb, topicName=血管病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=64bb23195917, createdName=Luyuxie_17, createdTime=Sun Oct 10 06:15:48 CST 2021, time=2021-10-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2001297, encodeId=22b5200129e3d, content=<a href='/topic/show?id=d5df12695e6' target=_blank style='color:#2F92EE;'>#Neurol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12695, encryptionId=d5df12695e6, topicName=Neurol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8217292, createdName=yinhl1978, createdTime=Wed Dec 29 08:15:48 CST 2021, time=2021-12-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1628780, encodeId=9d071628e8099, content=<a href='/topic/show?id=1c748491616' target=_blank style='color:#2F92EE;'>#脑淀粉样血管病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=103, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84916, encryptionId=1c748491616, topicName=脑淀粉样血管病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ac7921195890, createdName=Smile2687, createdTime=Sun Apr 11 21:15:48 CST 2021, time=2021-04-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=955638, encodeId=847395563800, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=dfc95478893, createdName=ms1000001799055092, createdTime=Sat Apr 10 09:22:23 CST 2021, time=2021-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=955623, encodeId=694a9556234b, content=好文章,共享之, beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJlfgys76DEiaNtbYo2re3ibjrUPTRibEXRyFwAB4aAGiave842S0FQDf0wAoaH226NiaSoPPDzhndsf1g/132, createdBy=88b489038, createdName=yangchou, createdTime=Sat Apr 10 07:14:49 CST 2021, time=2021-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=955622, encodeId=699b95562281, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=113, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b7a31928393, createdName=学医无涯, createdTime=Sat Apr 10 07:13:16 CST 2021, time=2021-04-10, status=1, ipAttribution=)]
    2021-04-10 yangchou

    好文章,共享之

    0

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    2021-04-10 学医无涯

    学习一下

    0

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