アクセス数 : ?
ダウンロード数 : ?
ID 114773
タイトル別表記
Valvuloarterial Impedence, Strain, Exercise, and AS
著者
Huded, Chetan P. Cleveland Clinic
Masri, Ahmad Cleveland Clinic
Goodman, Andrew L. Cleveland Clinic
Grimm, Richard A. Cleveland Clinic
Gillinov, A. Marc Cleveland Clinic
Johnston, Douglas R. Cleveland Clinic
Rodriguez, L. Leonardo Cleveland Clinic
Popovic, Zoran B. Cleveland Clinic
Svensson, Lars G. Cleveland Clinic
Griffin, Brian P. Cleveland Clinic
Desai, Milind Y. Cleveland Clinic
キーワード
aortic stenosis
strain
stress echocardiography
資料タイプ
学術雑誌論文
抄録
Background - In asymptomatic patients with severe aortic stenosis and preserved left ventricular ejection fraction, we sought to assess the incremental prognostic value of resting valvuloarterial impedence (Zva) and left ventricular global longitudinal strain (LV-GLS) to treadmill stress echocardiography.
Methods and Results - We studied 504 such patients (66±12 years, 78% men, 32% with coronary artery disease who underwent treadmill stress echocardiography between 2001 and 2012. Clinical and exercise variables (% of age-sex predicted metabolic equivalents [%AGP-METs]) were recorded. Resting Zva ([systolic arterial pressure+mean aortic valve gradient]/[LV-stroke volume index]) and LV-GLS(measured offline using Velocity Vector Imaging, Siemens) were obtained from the baseline resting echocardiogram. Death was the primary outcome. There were no major adverse cardiac events during treadmill stress echocardiography. Indexed aortic valve area, Zva, and LV-GLS were 0.46±0.1 cm2/m2, 4.5±0.9 mm Hg/mL per m2 and -16±4%, respectively; only 50% achieved >100% AGP-METs. Sixty-four percent underwent aortic valve replacement. Death occurred in 164 (33%) patients over 8.9±3.6 years (2 within 30 days of aortic valve replacement). On multivariable Cox survival analysis, higher Society of Thoracic Surgeons score (hazard ratio or HR 1.06), lower % AGP-METS (HR 1.16), higher Zva (HR 1.25) and lower LV-GLS (HR 1.12) were associated with higher longer-term mortality, while aortic valve replacement (HR 0.45) was associated with improved survival (all P<0.01). Sequential addition of ZVa and LV-GLS to clinical model (Society of Thoracic Surgeons score and %AGP-METs) increased the c-statistic from 0.65 to 0.69 and 0.75, respectively, both P<0.001); findings were similar in the subgroup of patients who underwent aortic valve replacement.
Conclusions - In asymptomatic patients with severe aortic stenosis undergoing treadmill stress echocardiography, LV-GLS and ZVa offer incremental prognostic value.
掲載誌名
Journal of the American Heart Association
ISSN
20479980
出版者
The American Heart Association
7
8
開始ページ
e007880
発行日
2018-04-12
権利情報
© 2018 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
病院