Ejection Fraction Indexed to Left Ventricular Mass and Its Association With Cardiac Event Risk in a Community Population With Mildly Reduced or Preserved Ejection Fraction.

IF 5 1区 医学 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS
Zhongying Zhang, Xianghua Fang, Cuicui Liu, Chunxiu Wang, Hongjun Liu, Wenbin Lu, Shaochen Guan, Huihui Li, Chunxiao Liu, Shuai Fan, Ya Yang
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引用次数: 0

Abstract

Background: Although previous studies have suggested that left ventricular ejection fraction (LVEF) adjusted by left ventricular mass (LVM) might improve prognostic risk stratification of cardiac events, few prospective cohort studies have examined its clinical implications. We assessed the predictive ability of LVEF indexed to LVM, body surface area (BSA), and body mass index for the cardiac event risk.

Methods: We conducted a 5.52-year cohort study on the association between LVEF indexed to LVM and cardiac events among 4266 participants with mildly reduced or preserved LVEF. Multivariable Cox regression analysis incorporating restricted cubic spline functions evaluated the predictive ability of LVEF, LVEF/LVM, and other indexed measures.

Results: After multivariable Cox regression adjustment, LVEF/LVM, LVEF/LVM/BSA, and LVEF/LVM/body mass index remained significantly associated with cardiac events (all P<0.05), whereas LVEF alone was not (P=0.569). Restricted cubic spline analysis identified a nonlinear approximately U-shaped relationship for both LVEF/LVM and LVEF/LVM/BSA (both P for nonlinearity<0.001). Compared with the middle reference group, participants in the low LVEF/LVM (hazard ratio [HR], 2.00 [95% CI, 1.08-3.71]) and low LVEF/LVM/BSA (HR, 2.13 [95% CI, 1.11-4.07]) groups had significantly higher risks. While the high groups showed nonsignificant differences (LVEF/LVM: HR, 1.41 [95% CI, 0.68-2.95]; LVEF/LVM/BSA: HR, 1.39 [95% CI, 0.65-2.99]), the observed risk pattern indicated that values outside the ranges of 4.72 to 5.53/kg (LVEF/LVM) and 19.7 to 24.3 m2/kg2 (LVEF/LVM/BSA) suggested a higher cardiac event risk.

Conclusions: LVEF indexed to LVM provides better cardiac event risk stratification than LVEF alone in individuals with mildly reduced or preserved ejection fraction.

射血分数与左心室质量挂钩及其与社区人群中射血分数轻度降低或保留的心脏事件风险的关系
背景:虽然以前的研究表明,通过左心室质量(LVM)调整左心室射血分数(LVEF)可能改善心脏事件的预后风险分层,但很少有前瞻性队列研究检查其临床意义。我们评估了LVEF与LVM、体表面积(BSA)和体重指数相关的心脏事件风险预测能力。方法:我们对4266名LVEF轻度降低或保留的参与者进行了一项5.52年的队列研究,以LVM为指标的LVEF与心脏事件之间的关系。结合限制三次样条函数的多变量Cox回归分析评估了LVEF、LVEF/LVM和其他指标的预测能力。结果:经多变量Cox回归调整后,LVEF/LVM、LVEF/LVM/BSA、LVEF/LVM/体重指数与心脏事件仍有显著相关性(均PP=0.569)。限制三次样条分析发现LVEF/LVM和LVEF/LVM/BSA呈非线性近似u型关系(非线性2/kg2 (LVEF/LVM/BSA)的P值均表明心脏事件风险较高。结论:在射血分数轻度降低或保留的个体中,LVEF与LVM指数相比,单独LVEF提供了更好的心脏事件风险分层。
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来源期刊
Journal of the American Heart Association
Journal of the American Heart Association CARDIAC & CARDIOVASCULAR SYSTEMS-
CiteScore
9.40
自引率
1.90%
发文量
1749
审稿时长
12 weeks
期刊介绍: As an Open Access journal, JAHA - Journal of the American Heart Association is rapidly and freely available, accelerating the translation of strong science into effective practice. JAHA is an authoritative, peer-reviewed Open Access journal focusing on cardiovascular and cerebrovascular disease. JAHA provides a global forum for basic and clinical research and timely reviews on cardiovascular disease and stroke. As an Open Access journal, its content is free on publication to read, download, and share, accelerating the translation of strong science into effective practice.
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