Prevalence and prognosis of unrecognized myocardial infarction determined by cardiac magnetic resonance in older adults.

Prevalence and prognosis of unrecognized myocardial infarction determined by cardiac magnetic resonance in older adults.
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DOI:
10.1001/2012.jama.11089
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发表时间:
2012-09-05
影响因子:
120.7
通讯作者:
Arai, Andrew E.
Arai, Andrew E.
中科院分区:
医学1区
文献类型:
--
作者:
Schelbert, Erik B.;Cao, Jie J.;Sigurdsson, Sigurdur;Aspelund, Thor;Kellman, Peter;Aletras, Anthony H.;Dyke, Christopher K.;Thorgeirsson, Gudmundur;Eiriksdottir, Gudny;Launer, Lenore J.;Gudnason, Vilmundur;Harris, Tamara B.;Arai, Andrew E.

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未被识别的心肌梗死 (MI) 具有重要的预后意义,但主要流行病学检测工具心电图 (ECG) 对 MI 不敏感。确定通过心脏磁共振 (CMR) 或心电图检测到的未识别 MI (UMI) 的患病率和死亡风险。冰岛 MI 是年龄、基因/环境易感性雷克雅未克研究(2004 年 1 月至 2007 年 1 月入组)的一项队列子研究,使用 ECG 或 CMR 来检测 UMI。冰岛 67 岁以上社区居民参与者。 936 名参与者(年龄 67-93 岁),其中 670 名随机选择,266 名患有糖尿病。截至 2011 年 9 月 1 日的 MI 患病率和死亡率。报告的结果具有 95% 的置信限和净重分类改进 (NRI)。在 936 名参与者中,91 名参与者识别出 MI(RMI;9.7% CI 8-12%),157 名参与者通过 CMR 发现 UMI(17%;CI 14-19%),这比 46 名根据 ECG 发现的 UMI 更为普遍(5%;CI 4-6%,p<0.001)。糖尿病参与者通过 CMR 测得的 UMI 多于通过心电图测得的 UMI(n=72;21%;CI 17-26% vs. n=15;4%;CI 2-7%,p<0.001)。 CMR 测得的 UMI 与动脉粥样硬化危险因素、冠状动脉钙化、冠状动脉血运重建和周围血管疾病相关。在平均 6.4 年的时间里,RMI 患者中有 33%(CI 23-43%)死亡(91 人中的 30 人),UMI 患者中有 28%(CI 21-35%)死亡(157 人中的 44 人),两者的死亡率均高于没有 MI 的患者(688 人中的 119 人)的 17%(CI 15-20%)死亡率。与 RMI 相比,CMR 的 UMI 改善了死亡率的风险分层(NRI:0.34;CI 0.16-0.53)。调整年龄、性别、糖尿病和 RMI 后,CMR 测得的 UMI 仍然与死亡率相关(HR 1.45 CI 1.02–2.06,绝对风险增加 (ARI) 8%),并显着改善死亡率的风险分层,NRI 0.16 (CI 0.01–0.31)),但 ECG 测得的 UMI 则不然(HR 0.88,CI 0.45–1.73 ARI −2%; NRI:-0.05;CI-0.17-0.05)。与 RMI 患者相比,CMR 诊断为 UMI 的参与者使用他汀类药物等心脏药物的频率较低(36%;CI,28-43% 或 56/157 vs.73%;CI 63-82% 或 66/91;p<0.001)。在基于社区的队列中,CMR 测得的 UMI 患病率高于心电图识别的 MI 或 UMI 患病率,并且与死亡风险增加相关。
Unrecognized myocardial infarction (MI) is prognostically important but electrocardiography (ECG), the main epidemiology tool for detection, is insensitive to MI. Determine prevalence and mortality risk for unrecognized MI (UMI) detected by cardiac magnetic resonance (CMR) or ECG. ICELAND MI is a cohort substudy of the Age, Gene/Environment Susceptibility-Reykjavik Study (enrollment January 2004–January 2007) using ECG or CMR to detect UMI. Community dwelling participants in Iceland over age 67. 936 participants (ages 67–93 years) including 670 who were randomly selected and 266 with diabetes. MI prevalence and mortality through September 1, 2011. Results reported with 95% confidence limits and net reclassification improvement (NRI). Of 936 participants, 91 had recognized MI (RMI; 9.7% CI 8–12%), and 157 had UMI by CMR (17%; CI 14–19%) which was more prevalent than the 46 UMI by ECG (5%; CI 4–6%, p<0.001). Diabetic participants had more UMI by CMR than UMI by ECG (n=72; 21%; CI 17–26% vs. n=15; 4%; CI 2–7%, p<0.001). UMI by CMR was associated with atherosclerosis risk factors, coronary calcium, coronary revascularization, and peripheral vascular disease. Over a median of 6.4 years, 33% (CI 23–43%) of individuals with RMI died (30 of 91) and 28% (CI 21–35%) with UMI died (44 of 157), both higher rates than the 17% (CI 15–20%) with no MI that died (119 of 688). UMI by CMR improved risk stratification for mortality over RMI (NRI: 0.34; CI 0.16–0.53). Adjusting for age, sex, diabetes, and RMI, UMI by CMR remained associated with mortality (HR 1.45 CI 1.02–2.06, absolute risk increase (ARI) 8%) and significantly improved risk stratification for mortality, NRI 0.16 (CI 0.01–0.31)) but UMI by ECG did not (HR 0.88, CI 0.45–1.73 ARI −2%; NRI: −0.05; CI −0.17–0.05). Compared to those with RMI, participants with UMI by CMR used cardiac medications such as statins less often (36%; CI, 28–43% or 56/157 vs.73%; CI 63–82% or 66/91; p<0.001). In a community-based cohort, the prevalence of UMI by CMR was higher than the prevalence of recognized MI or UMI by ECG, and was associated with increased mortality risk.
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