Abstract
Background: In patients with aortic stenosis, subtle alterations in myocardial mechanics can be detected by speckle-tracking echocardiography before reduction of left ventricular ejection fraction (LVEF).
Methods: In this prospective study, 162 patients with aortic stenosis with an average aortic valve area of 0.7 +/- 0.2 cm(2) and a mean LVEF of 60 +/- 11% were included. Global longitudinal strain (GLS) and mechanical dispersion (SD of time from Q/R on the electrocardiogram to peak strain in 16 left ventricular segments) were assessed using echocardiography, and all-causemortality (n=37) was recordedduring37 +/- 13 months of follow-up.
Results: Overall, nonsurvivors had more pronounced mechanical dispersion and worse GLS compared with survivors (74 +/- 24 vs 61 +/- 18 msec [P
Conclusion: Increased mechanical dispersion may be a risk marker providing novel prognostic information in patients with aortic stenosis.
Original language | English |
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Pages (from-to) | 727-735.e1 |
Number of pages | 10 |
Journal | Journal of the American Society of Echocardiography |
Volume | 30 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 2017 |
Keywords
- Aortic stenosis
- Speckle-tracking echocardiography
- Risk assessment
- Ventricular function
- PRESERVED EJECTION FRACTION
- GLOBAL LONGITUDINAL STRAIN
- ALL-CAUSE MORTALITY
- MYOCARDIAL-INFARCTION
- VALVE-REPLACEMENT
- MECHANICAL DISPERSION
- RISK PREDICTION
- ARRHYTHMIAS
- CARDIOMYOPATHY
- DYSFUNCTION