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Circulation:严重主动脉瓣狭窄患者心肌瘢痕与死亡率

2018-10-05 xing.T MedSci原创

由此可见,在严重AS患者中,心肌瘢痕与死亡率独立相关;它的存在与后期死亡率增加2倍有关。

主动脉瓣狭窄(AS)患者进行主动脉瓣置换术(AVR)主要取决于症状的发展;但是晚期手术可能导致不可逆的心肌功能障碍和额外的风险。近日,血管领域权威杂志Circulation上发表了一篇研究文章,该研究旨在明确术前存在局灶性心肌瘢痕是否与长期死亡率相关。

在纵向观察性结局研究中,研究人员对在英国6个心胸中心进行瓣膜介入治疗的严重AS患者进行了生存分析。患者在2003年1月至2015年5月期间接受了术前超声心动图(用于瓣膜严重程度评估)和心室磁共振用于心室容量、功能和瘢痕定量。心肌瘢痕分为三种类别(无、梗死性或非梗死性),并使用左心室的百分比进行定量。研究人员随访了全因和血管死亡至少2年。

该研究共纳入了674例严重AS患者(75±14岁,63%为男性; AV面积为0.38±0.14cm2/m2;平均压力梯度为46±18mmHg,LVEF为61.0±16.7%)。瘢痕占51%(18%为梗死性; 33%为非梗死性)。手术治疗(SAVR,n=399)或经导管治疗(TAVR,n=275)。在随访期间(中位数为3.6年),145例(21.5%)患者死亡(SAVR后52例,TAVR后93例)。在多变量分析中,与全因死亡率独立相关的因素是年龄(HR为1.50,95%CI为1.11-2.04,p=0.009)、STS评分(HR为1.12,95%CI为1.03-1.22,p=0.007)和心肌瘢痕(HR为2.39,95%CI为1.40-4.05,p=0.001)。无论干预如何(TAVR,p=0.002;SAVR,p=0.026),心肌瘢痕均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心肌瘢痕负担每增加1%,全因死亡率增加11%(HR为1.11; 95%CI为1.05-1.17; p<0.001),心血管死亡率增加8%(HR为1.08; 95%CI为1.01-1.17; p<0.001)。

由此可见,在严重AS患者中,心肌瘢痕与死亡率独立相关;它的存在与后期死亡率增加2倍有关。

原始出处:

Tarique A. Musa,et al. Myocardial Scar and Mortality in Severe Aortic Stenosis: Data from the BSCMR Valve Consortium. Circulation. 2018. https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.117.032839

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