Circulation:重度主动脉瓣狭窄的心肌瘢痕和死亡率

2018-07-13 xiangting MedSci原创

在重度AS患者中,心血管MR的晚期钆增强与死亡率独立相关;它的存在与晚期死亡率高2倍相关。

主动脉瓣狭窄(AS)进行主动脉瓣置换术(AVR)的时间主要取决于症状的进展;但是晚期手术可能导致不可逆的心肌功能障碍和额外风险。这项研究旨在确定术前局灶性心肌瘢痕是否与长期死亡率相关。

在这项纵向观察性预后研究中,对在6个英国心胸中心接受瓣膜介入治疗的重度AS患者进行生存分析。患者在2003年1月至2015年5月间接受术前超声心动图检查(用于瓣膜严重程度评估)和心血管磁共振(用于评估心室容积、功能和瘢痕定量)。心肌瘢痕分为三种类型(无、梗死型或非梗死型),使用全宽半高法作为左心室百分比进行量化。跟踪全因死亡率和心血管死亡率至少2年。

共纳入674例重度AS患者(75±14岁,63%男性;AV面积0.38±0.14cm2/m2;平均梯度46±18mmHg,LVEF 61.0±16.7%)。51%的患者存在瘢痕(18%为梗死型;33%为非梗死型)。治疗是手术(SAVR,n=399)或经导管介入(TAVR,n=275)。在随访期间(中位数为3.6年),145例患者(21.5%)死亡(SAVR后52例,TAVR后93例)。在多因素分析中,与全因死亡率独立相关的因素是年龄(HR 1.50,95%CI:1.11-2.04,p=0.009;按10年期计算),STS评分(HR 1.12,95%CI 1.03-1.22,p=0.007)和存在瘢痕(HR 2.39,95%CI 1.40-4.05,p=0.001)。无论治疗如何(TAVR p=0.002,SAVR p=0.026 [全因死亡率]),瘢痕可以独立预测全因死亡率(26.4%vs 12.9%;p<0.001)和心血管死亡率(15.0%vs 4.8%;p<0.001)。LV心肌瘢痕负荷每增加1%,全因死亡风险上升11%(HR 1.11;95%CI:1.05-1.17;p<0.001),心血管死亡风险上升8%(HR 1.08; 95%CI:1.01-1.17;p<0.001)。

在重度AS患者中,心血管MR的晚期钆增强与死亡率独立相关;它的存在与晚期死亡率高2倍相关。

原始出处:

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    2018-07-13 哈哈869

    学了

    0

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    2018-07-13 哈哈869

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    2018-07-13 哈哈869

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