J Vasc Surg :无症状颈动脉狭窄与脑灌注不足有关

2020-11-30 《门诊》杂志 门诊新视野

近50%的无症状颈动脉狭窄(ACS)患者表现出认知障碍。最近的证据表明,脑灌注不足是认知障碍的一个重要原因。颈动脉狭窄会限制流入大脑的血液,从而导致脑灌注不足。

近50%的无症状颈动脉狭窄(ACS)患者表现出认知障碍。最近的证据表明,脑灌注不足是认知障碍的一个重要原因。颈动脉狭窄会限制流入大脑的血液,从而导致脑灌注不足。相反,通过Willis环和脑血管舒张的跨半球侧支性代偿也可以减轻血流限制的影响。因此,来自美国的血管外科专家、生物工程学专家以及影像学专家等共同合作开发一种临床相关的测量ACS患者净脑灌注的方法,它可以帮助进行危险分层和确定治疗方式。

为了确定ACS是否导致脑灌流不足,研究者开发了一种新的方法来量化全脑灌注加权磁共振成像(PWI)中峰值时间(TTP)和平均传输时间(MTT)延迟的半球间脑灌注差异。为了评估临床多普勒超声(DUS)推断脑灌注的实用性,以及评估PWI和超声收缩压峰值速度(PSV)之间的关系。该研究于2020年11月6日在线发表于Journal of Vascular Surgery杂志网站上。

研究方法

对20例ACS≥70%的患者行脑部MRI和颈动脉MRA检查。DUS提供PSV,MRA提供狭窄处斑块几何测量。分析PWI的全脑容积灌注图,以获得TTP和MTT延迟的平均半球间差异。此外,还测量了脑容量中显示TTP和MTT延迟的比例。这些比例是为了增加血流延迟的严重程度(0.5、1.0和2.0秒)而测量的。最后,PWI灌注不对称性与PSV相关,DUS狭窄特征与Pearson相关系数相关。

研究结果

18例为单侧狭窄(右侧8例,左侧10例),2例为双侧狭窄。测量全脑容量的半球间(左-右)TTP延迟发现18例患者中有16例与狭窄同侧半球灌注受损。超过45%的患者至少有一半的脑容量经历缺血,TTP延迟> 0.5秒。TTP和MTT延迟与PSV有很强的相关性,而与狭窄百分比的相关性较弱。PSV与全脑灌注缺损(TTP和MTT延迟)的相关性最强(r分别为0.80和0.74),而不是当前临床方案中单个MRA切片测量的结果(r分别为0.31和0.58)。

结 论

PWI测量全脑半球间TTP和MTT延迟为ACS患者评估脑灌注缺损提供了一种新的工具。在80%以上的患者中,颈动脉狭窄与同侧脑灌注比对侧脑灌注明显减少相关。超声测量颈动脉狭窄时的PSV与TTP和MTT延迟相关,可以作为这些患者脑灌注不足的临床替代物。

关键发现

使用灌注加权磁共振成像来定量全脑脑灌注缺损的一种新方法,在超过80%的高级别(≥70%)无症状颈动脉狭窄患者中发现脑灌注受损。临床超声测量的收缩期峰值速度(PSV)与灌注不足密切相关(r = 0.81)。超声上收缩期峰值速度的升高与MR灌注扫描的峰值时间和平均传输时间延迟相关,可以作为这些患者脑灌注不足的临床有用替代物。

小贴士

大量无症状颈动脉狭窄患者存在脑灌注不足,基于多普勒超声峰值的收缩期速度可作为灌注状态的有效替代物。定量分析脑灌注不足可能有助于对无症状颈动脉狭窄患者进行危险分层。

原始出处:
Amir A. Khan, Jigar Patel, Sarasijhaa Desikan,et al. Asymptomatic carotid artery stenosis is associated with cerebral hypoperfusion. Journal of Vascular Surgery. 2020. DOI:https://doi.org/10.1016/j.jvs.2020.10.063;

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    2021-03-19 quxin068
  4. [GetPortalCommentsPageByObjectIdResponse(id=1843591, encodeId=adce18435916c, content=<a href='/topic/show?id=dab8100523bb' target=_blank style='color:#2F92EE;'>#颈动脉#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=100523, encryptionId=dab8100523bb, topicName=颈动脉)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=416347, createdName=mhzhuang@stu.e, createdTime=Tue Dec 29 05:34:53 CST 2020, time=2020-12-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1967443, encodeId=b444196e44324, content=<a href='/topic/show?id=ba21590e1f9' target=_blank style='color:#2F92EE;'>#无症状颈动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59071, encryptionId=ba21590e1f9, topicName=无症状颈动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c279140, createdName=vividelife, createdTime=Fri Sep 03 22:34:53 CST 2021, time=2021-09-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1939122, encodeId=c524193912258, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Fri Mar 19 06:34:53 CST 2021, time=2021-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1751378, encodeId=2a661e5137849, content=<a href='/topic/show?id=42988492ec0' target=_blank style='color:#2F92EE;'>#脑灌注#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84927, encryptionId=42988492ec0, topicName=脑灌注)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0a4236283426, createdName=hywen7338, createdTime=Fri Nov 05 17:34:53 CST 2021, time=2021-11-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1485137, encodeId=3653148513e92, content=<a href='/topic/show?id=4bbe5902ed2' target=_blank style='color:#2F92EE;'>#无症状#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59027, encryptionId=4bbe5902ed2, topicName=无症状)], attachment=null, authenticateStatus=null, createdAvatar=Bioon/avatar/20180429/70baad2aa5a046c5aa2914d262de7d37.jpg, createdBy=bd077990475, createdName=12498da4m34(暂无昵称), createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1496923, encodeId=52341496923ac, content=<a href='/topic/show?id=217b33259df' target=_blank style='color:#2F92EE;'>#动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33259, encryptionId=217b33259df, topicName=动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b4ae9287436, createdName=piaojinhua, createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903753, encodeId=fb2a903e5327, content=大量无症状颈动脉狭窄患者存在脑灌注不足,基于多普勒超声峰值的收缩期速度可作为灌注状态的有效替代物。定量分析脑灌注不足可能有助于对无症状颈动脉狭窄患者进行危险分层。 , beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210325/2d9c955949df4b349a439f1a6773499e/b39f4845e869489d95bc545c79cf60fa.jpg, createdBy=303f5433779, createdName=Oranhyg, createdTime=Tue Dec 01 08:18:28 CST 2020, time=2020-12-01, status=1, ipAttribution=)]
  5. [GetPortalCommentsPageByObjectIdResponse(id=1843591, encodeId=adce18435916c, content=<a href='/topic/show?id=dab8100523bb' target=_blank style='color:#2F92EE;'>#颈动脉#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=100523, encryptionId=dab8100523bb, topicName=颈动脉)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=416347, createdName=mhzhuang@stu.e, createdTime=Tue Dec 29 05:34:53 CST 2020, time=2020-12-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1967443, encodeId=b444196e44324, content=<a href='/topic/show?id=ba21590e1f9' target=_blank style='color:#2F92EE;'>#无症状颈动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59071, encryptionId=ba21590e1f9, topicName=无症状颈动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c279140, createdName=vividelife, createdTime=Fri Sep 03 22:34:53 CST 2021, time=2021-09-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1939122, encodeId=c524193912258, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Fri Mar 19 06:34:53 CST 2021, time=2021-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1751378, encodeId=2a661e5137849, content=<a href='/topic/show?id=42988492ec0' target=_blank style='color:#2F92EE;'>#脑灌注#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84927, encryptionId=42988492ec0, topicName=脑灌注)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0a4236283426, createdName=hywen7338, createdTime=Fri Nov 05 17:34:53 CST 2021, time=2021-11-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1485137, encodeId=3653148513e92, content=<a href='/topic/show?id=4bbe5902ed2' target=_blank style='color:#2F92EE;'>#无症状#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59027, encryptionId=4bbe5902ed2, topicName=无症状)], attachment=null, authenticateStatus=null, createdAvatar=Bioon/avatar/20180429/70baad2aa5a046c5aa2914d262de7d37.jpg, createdBy=bd077990475, createdName=12498da4m34(暂无昵称), createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1496923, encodeId=52341496923ac, content=<a href='/topic/show?id=217b33259df' target=_blank style='color:#2F92EE;'>#动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33259, encryptionId=217b33259df, topicName=动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b4ae9287436, createdName=piaojinhua, createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903753, encodeId=fb2a903e5327, content=大量无症状颈动脉狭窄患者存在脑灌注不足,基于多普勒超声峰值的收缩期速度可作为灌注状态的有效替代物。定量分析脑灌注不足可能有助于对无症状颈动脉狭窄患者进行危险分层。 , beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210325/2d9c955949df4b349a439f1a6773499e/b39f4845e869489d95bc545c79cf60fa.jpg, createdBy=303f5433779, createdName=Oranhyg, createdTime=Tue Dec 01 08:18:28 CST 2020, time=2020-12-01, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=1843591, encodeId=adce18435916c, content=<a href='/topic/show?id=dab8100523bb' target=_blank style='color:#2F92EE;'>#颈动脉#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=100523, encryptionId=dab8100523bb, topicName=颈动脉)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=416347, createdName=mhzhuang@stu.e, createdTime=Tue Dec 29 05:34:53 CST 2020, time=2020-12-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1967443, encodeId=b444196e44324, content=<a href='/topic/show?id=ba21590e1f9' target=_blank style='color:#2F92EE;'>#无症状颈动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59071, encryptionId=ba21590e1f9, topicName=无症状颈动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c279140, createdName=vividelife, createdTime=Fri Sep 03 22:34:53 CST 2021, time=2021-09-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1939122, encodeId=c524193912258, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Fri Mar 19 06:34:53 CST 2021, time=2021-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1751378, encodeId=2a661e5137849, content=<a href='/topic/show?id=42988492ec0' target=_blank style='color:#2F92EE;'>#脑灌注#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84927, encryptionId=42988492ec0, topicName=脑灌注)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0a4236283426, createdName=hywen7338, createdTime=Fri Nov 05 17:34:53 CST 2021, time=2021-11-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1485137, encodeId=3653148513e92, content=<a href='/topic/show?id=4bbe5902ed2' target=_blank style='color:#2F92EE;'>#无症状#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59027, encryptionId=4bbe5902ed2, topicName=无症状)], attachment=null, authenticateStatus=null, createdAvatar=Bioon/avatar/20180429/70baad2aa5a046c5aa2914d262de7d37.jpg, createdBy=bd077990475, createdName=12498da4m34(暂无昵称), createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1496923, encodeId=52341496923ac, content=<a href='/topic/show?id=217b33259df' target=_blank style='color:#2F92EE;'>#动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33259, encryptionId=217b33259df, topicName=动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b4ae9287436, createdName=piaojinhua, createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903753, encodeId=fb2a903e5327, content=大量无症状颈动脉狭窄患者存在脑灌注不足,基于多普勒超声峰值的收缩期速度可作为灌注状态的有效替代物。定量分析脑灌注不足可能有助于对无症状颈动脉狭窄患者进行危险分层。 , beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210325/2d9c955949df4b349a439f1a6773499e/b39f4845e869489d95bc545c79cf60fa.jpg, createdBy=303f5433779, createdName=Oranhyg, createdTime=Tue Dec 01 08:18:28 CST 2020, time=2020-12-01, status=1, ipAttribution=)]
  7. [GetPortalCommentsPageByObjectIdResponse(id=1843591, encodeId=adce18435916c, content=<a href='/topic/show?id=dab8100523bb' target=_blank style='color:#2F92EE;'>#颈动脉#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=100523, encryptionId=dab8100523bb, topicName=颈动脉)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=416347, createdName=mhzhuang@stu.e, createdTime=Tue Dec 29 05:34:53 CST 2020, time=2020-12-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1967443, encodeId=b444196e44324, content=<a href='/topic/show?id=ba21590e1f9' target=_blank style='color:#2F92EE;'>#无症状颈动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59071, encryptionId=ba21590e1f9, topicName=无症状颈动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c279140, createdName=vividelife, createdTime=Fri Sep 03 22:34:53 CST 2021, time=2021-09-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1939122, encodeId=c524193912258, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Fri Mar 19 06:34:53 CST 2021, time=2021-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1751378, encodeId=2a661e5137849, content=<a href='/topic/show?id=42988492ec0' target=_blank style='color:#2F92EE;'>#脑灌注#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84927, encryptionId=42988492ec0, topicName=脑灌注)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0a4236283426, createdName=hywen7338, createdTime=Fri Nov 05 17:34:53 CST 2021, time=2021-11-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1485137, encodeId=3653148513e92, content=<a href='/topic/show?id=4bbe5902ed2' target=_blank style='color:#2F92EE;'>#无症状#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59027, encryptionId=4bbe5902ed2, topicName=无症状)], attachment=null, authenticateStatus=null, createdAvatar=Bioon/avatar/20180429/70baad2aa5a046c5aa2914d262de7d37.jpg, createdBy=bd077990475, createdName=12498da4m34(暂无昵称), createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1496923, encodeId=52341496923ac, content=<a href='/topic/show?id=217b33259df' target=_blank style='color:#2F92EE;'>#动脉狭窄#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33259, encryptionId=217b33259df, topicName=动脉狭窄)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b4ae9287436, createdName=piaojinhua, createdTime=Wed Dec 02 14:34:53 CST 2020, time=2020-12-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903753, encodeId=fb2a903e5327, content=大量无症状颈动脉狭窄患者存在脑灌注不足,基于多普勒超声峰值的收缩期速度可作为灌注状态的有效替代物。定量分析脑灌注不足可能有助于对无症状颈动脉狭窄患者进行危险分层。 , beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210325/2d9c955949df4b349a439f1a6773499e/b39f4845e869489d95bc545c79cf60fa.jpg, createdBy=303f5433779, createdName=Oranhyg, createdTime=Tue Dec 01 08:18:28 CST 2020, time=2020-12-01, status=1, ipAttribution=)]
    2020-12-01 Oranhyg

    大量无症状颈动脉狭窄患者存在脑灌注不足,基于多普勒超声峰值的收缩期速度可作为灌注状态的有效替代物。定量分析脑灌注不足可能有助于对无症状颈动脉狭窄患者进行危险分层。

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