Article

Should early elective surgery be performed in patients with severe but asymptomatic aortic stenosis?

Department of Cardiology, Vienna General Hospital, University of Vienna, Vienna, Austria.
European Heart Journal (Impact Factor: 14.1). 10/2002; 23(18):1417-21. DOI:10.1053/euhj.2002.3163
Source: PubMed
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    ABSTRACT: Degenerative aortic stenosis (AS) has become the most common valvular heart disease and the definitive treatment of symptomatic, severe AS is surgical valve replacement. In the absence of symptoms, the presence of left ventricular (LV) systolic dysfunction is pivotal in making treatment decisions for patients with AS. However, the LV ejection fraction is not a sensitive marker of global LV systolic function in the presence of LV hypertrophy, implying that asymptomatic patients with AS can have myocardial dysfunction with preserved LV ejection fraction. Abnormal myocardial mechanics might explain the pathophysiological processes underlying chronic pressure overload in AS. In this article, we review how new echocardiographic deformation parameters--such as myocardial strain, strain rate, and twist measurements--offer the potential for clinicians to monitor the course of LV dysfunction in patients with AS. Quantifying disturbances in LV function might provide insight into the timing of aortic valve replacement and into the improvement of LV systolic and diastolic properties through regression of LV hypertrophy and fibrosis after valve implantation.
    Nature Reviews Cardiology 06/2011; 8(9):494-501. · 10.40 Impact Factor
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    10/2011; , ISBN: 978-953-307-660-7
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    ABSTRACT: Aortic stenosis (AS) is the most frequent valvular heart disease. Severe AS results in concentric left ventricular hypertrophy, and ultimately, the heart dilates and fails. During a long period of time patients remain asymptomatic. In this period a pathology progression should be monitored and effectively thwarted by targeted measures. A cascade of cellular and molecular events leads to chronic degeneration of aortic valves. There are some molecular attributes characteristic for the process of valvular degeneration with clear functional link between shifted cell-cycle control, calcification and tissue remodelling of aortic valves. Bioactivity of implanted bioprosthesis is assumed to result in its dysfunction. Age, gender (females), smoking, Diabetes mellitus, and high cholesterol level dramatically shorten the re-operation time. Therefore, predictive and preventive measures would be highly beneficial, in particular for young female diabetes-predisposed patients. Molecular signature of valvular degeneration is reviewed here with emphases on clinical meaning, risk-assessment, predictive diagnosis, individualised treatments.
    EPMA Journal, The 03/2011; 2(1):91-105.

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