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J Am Heart Assoc: QT间期延长与较差的左心室功能和死亡风险增加相关

2016-11-02 MedSci MedSci原创

背景:QT间期与心血管事件相关。在低左室射血分数(LVEF),低流量,低梯度的主动脉瓣狭窄(LF-LG AS)患者中,QT间期与左心室(LV)功能及预后的相关性的研究较少。研究者旨在检查与校正的QT间期(QTc)与左心室功能和预后的关系。方法和结果:93例LF-LG AS的患者(73±10岁;74%为男性)(平均梯度小于40mmHg和索引主动脉瓣区≤0.6 cm2/m2)和LVEF减少(≤40%)

背景:QT间期与心血管事件相关。在低左室射血分数(LVEF),低流量,低梯度的主动脉瓣狭窄(LF-LG AS)患者中,QT间期与左心室(LV)功能及预后的相关性的研究较少。研究者旨在检查与校正的QT间期(QTc)与左心室功能和预后的关系。

方法和结果:93例LF-LG AS的患者(73±10岁;74%为男性)(平均梯度小于40mmHg和索引主动脉瓣区≤0.6 cm2/m2)和LVEF减少(≤40%)纳入分析,在随访的3个月内,63例患者行主动脉瓣置换术。男性QTc间期延长为QTc>450 ms;女性QTc间期延长>470ms。用斑点追踪测量LV整体纵向应变,用绝对值|%|来表示。QTc与以下变量相关:整体纵向应变(R = -0.40,P = 0.005),左室射血分数(R = -0.27,P = 0.02)、每搏量(R = -0.35,P = 0.007)和B型钠尿肽(r = 0.45,P = 0.0006)。随访时间的中位数为2年,49例死亡。QTc间期延长与全因死亡率(HR= 2.05;P = 0.01)和心血管死亡(HR= 1.89;P = 0.04)增加2倍相关。在多变量分析中,校正EuroSCORE,主动脉瓣置换术,心肌梗死史,左室射血分数,和ß-受体阻断剂,延长QTc与全因死亡率(HR= 2.56;P = 0.008)和心血管死亡率(HR= 2.50;P = 0.02)独立相关。

结论:LF-LG AS患者和LVEF降低,QTc间期延长与较差的LV功能死亡风险增加相关。评估QTc间期可能提供一个简单的工具来改善LF-LG AS患者的危险分层。

原始出处:

Dahou A, Toubal O,et al. Relationship Between QT Interval and Outcome in Low-Flow Low-Gradient Aortic Stenosis With Low Left Ventricular Ejection Fraction. J Am Heart Assoc. 2016 Oct 20

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    2016-11-04 zhaojie88
  5. [GetPortalCommentsPageByObjectIdResponse(id=1796522, encodeId=686b1e9652247, content=<a href='/topic/show?id=511f18046c2' target=_blank style='color:#2F92EE;'>#T间期延长#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=18046, encryptionId=511f18046c2, topicName=T间期延长)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9d0b2500136, createdName=12498b08m90暂无昵称, createdTime=Thu Jan 12 08:22:00 CST 2017, time=2017-01-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1677833, encodeId=d87216e7833ba, content=<a href='/topic/show?id=2ba6150049b' target=_blank style='color:#2F92EE;'>#QT间期延长#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15004, encryptionId=2ba6150049b, topicName=QT间期延长)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3d0327606456, createdName=ewsr10, createdTime=Sun Jul 23 12:22:00 CST 2017, time=2017-07-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1255601, encodeId=4445125560140, content=<a href='/topic/show?id=587f6339050' target=_blank style='color:#2F92EE;'>#死亡风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=63390, encryptionId=587f6339050, topicName=死亡风险)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1356134, encodeId=51901356134b2, content=<a href='/topic/show?id=b0702e84b9' target=_blank style='color:#2F92EE;'>#ART#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2784, encryptionId=b0702e84b9, topicName=ART)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1399446, encodeId=49c91399446e5, content=<a href='/topic/show?id=72d615003a5' target=_blank style='color:#2F92EE;'>#QT间期#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15003, encryptionId=72d615003a5, topicName=QT间期)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d8202208740, createdName=xinmeili, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1413176, encodeId=339614131e646, content=<a href='/topic/show?id=1d7e48033f5' target=_blank style='color:#2F92EE;'>#左心室#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=148, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=48033, encryptionId=1d7e48033f5, topicName=左心室)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=15012955474, createdName=wushaoling, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1562403, encodeId=f316156240366, content=<a href='/topic/show?id=f69d864413' target=_blank style='color:#2F92EE;'>#HEART#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8644, encryptionId=f69d864413, topicName=HEART)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=80d715270048, createdName=slcumt, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=1796522, encodeId=686b1e9652247, content=<a href='/topic/show?id=511f18046c2' target=_blank style='color:#2F92EE;'>#T间期延长#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=18046, encryptionId=511f18046c2, topicName=T间期延长)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9d0b2500136, createdName=12498b08m90暂无昵称, createdTime=Thu Jan 12 08:22:00 CST 2017, time=2017-01-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1677833, encodeId=d87216e7833ba, content=<a href='/topic/show?id=2ba6150049b' target=_blank style='color:#2F92EE;'>#QT间期延长#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15004, encryptionId=2ba6150049b, topicName=QT间期延长)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3d0327606456, createdName=ewsr10, createdTime=Sun Jul 23 12:22:00 CST 2017, time=2017-07-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1255601, encodeId=4445125560140, content=<a href='/topic/show?id=587f6339050' target=_blank style='color:#2F92EE;'>#死亡风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=63390, encryptionId=587f6339050, topicName=死亡风险)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1356134, encodeId=51901356134b2, content=<a href='/topic/show?id=b0702e84b9' target=_blank style='color:#2F92EE;'>#ART#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2784, encryptionId=b0702e84b9, topicName=ART)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1399446, encodeId=49c91399446e5, content=<a href='/topic/show?id=72d615003a5' target=_blank style='color:#2F92EE;'>#QT间期#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15003, encryptionId=72d615003a5, topicName=QT间期)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d8202208740, createdName=xinmeili, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1413176, encodeId=339614131e646, content=<a href='/topic/show?id=1d7e48033f5' target=_blank style='color:#2F92EE;'>#左心室#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=148, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=48033, encryptionId=1d7e48033f5, topicName=左心室)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=15012955474, createdName=wushaoling, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1562403, encodeId=f316156240366, content=<a href='/topic/show?id=f69d864413' target=_blank style='color:#2F92EE;'>#HEART#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8644, encryptionId=f69d864413, topicName=HEART)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=80d715270048, createdName=slcumt, createdTime=Fri Nov 04 13:22:00 CST 2016, time=2016-11-04, status=1, ipAttribution=)]
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    2016-11-04 slcumt

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