Prospective study of asymptomatic valvular aortic stenosis - Clinical, echocardiographic, and exercise predictors of outcome

被引:829
作者
Otto, CM
Burwash, IG
Legget, ME
Munt, BI
Fujioka, M
Healy, NL
Kraft, CD
MiyakeHull, CY
Schwaegler, RG
机构
[1] Division of Cardiology, Department of Medicine, University of Washington, Seattle, WA
[2] Division of Cardiology, Box 356422, University of Washington, Seattle
关键词
stenosis; aorta; valves; exercise;
D O I
10.1161/01.CIR.95.9.2262
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background Only limited data on the rate of hemodynamic progression and predictors of outcome in asymptomatic patients with valvular aortic stenosis (AS) are available. Methods and Results In 123 adults (mean age, 63+/-16 years) with asymptomatic AS, annual clinical, echocardiorraphic, and exercise data were obtained prospectively (mean follow-up of 2.5+/-1.4 years). Aortic jet velocity increased by 0.32+/-0.34 m/s per year and mean gradient by 7+/-7 mm Hg per year; valve area decreased by 0.12+/-0.19 cm(1) per year. Kaplan-Meier event-free survival. with end points defined as death (n=8) or aortic valve surgery (n=48), was 93+/-5% at 1 year, 62+/-5% at 3 years, and 26 +/- 10% at 5 years. Univariate predictors of outcome included baseline jet velocity, mean gradient, valve area, and the rate of increase in jet velocity (all P less than or equal to.001) but not age, sex, or cause of AS. Those with an end point had a smaller exercise increase in valve area, blood pressure, and cardiac output and a greater exercise decrease in stroke volume. Multivariate predictors of outcome were jet velocity at baseline (P<.0001), the rate of change in jet velocity (P<.0001), and functional status score (P=.002). The likelihood of remaining alive without valve replacement at 2 years was only 21+/-18% for a jet velocity at entry >4.0 m/s, compared with 66+/-13% for a velocity of 3.0 to 4.0 m/s and 84+/-16% for a jet velocity <3.0 m/s (P<.0001). Conclusions In adults with asymptomatic AS, the rate of hemodynamic progression and clinical outcome are predicted by jet velocity, the rare of change in jet velocity, and functional status.
引用
收藏
页码:2262 / 2270
页数:9
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