Reference : Impact of aortic stenosis on longitudinal myocardial deformation during exercise.
Scientific journals : Article
Human health sciences : General & internal medicine
http://hdl.handle.net/2268/109728
Impact of aortic stenosis on longitudinal myocardial deformation during exercise.
English
Donal, E. [ > > ]
Thebault, C. [ > > ]
O'Connor, K. [ > > ]
Veillard, D. [ > > ]
Rosca, M. [ > > ]
Pierard, Luc mailto [Université de Liège - ULg > Département des sciences cliniques > Cardiologie - Pathologie spéciale et réhabilitation >]
Lancellotti, Patrizio mailto [Université de Liège - ULg > Département des sciences cliniques > Imagerie cardiaque fonctionnelle par échographie >]
12-Mar-2011
European Journal of Echocardiography
Harcourt Publishers Limited
Yes (verified by ORBi)
International
1525-2167
1532-2114
[en] Aortic valve stenosis ; Exercise echocardiography ; Strain ; Left ventricle
[en] In aortic stenosis (AS), left ventricular (LV) adaptation to exercise has poorly been examined. Changes in LV ejection fraction may lack accuracy in identifying the presence of intrinsic myocardial impairment.
AIMS: We sought to determine the impact of aortic stenosis (AS) on left ventricular (LV) longitudinal function at exercise in a series of asymptomatic patients with AS and preserved LV ejection fraction.
METHODS AND RESULTS: Long-axis function was assessed at rest and at exercise by using 2D speckle tracking of myocardial deformation in 207 AS patients (aortic valve area 0.87 ± 0.19 cm²) and 43 aged-matched control subjects. When compared with control subjects, patients with AS have reduced longitudinal myocardial function at rest (-20.2 ± 2.7 vs. -15.4 ± 4.0%) and at peak exercise (-25.0 ± 3.7 vs. -16.5 ± 4.9%) (P < 0.0001 for both). Exercise changes in global longitudinal strain were correlated with changes in LV ejection in controls but not in patients with AS. Changes in LV global longitudinal strain during test were lower in AS patients with an abnormal response to exercise (-0.5 ± 2.7 vs. -1.5 ± 2.8%, P = 0.001). In multivariate analysis, a lower global longitudinal strain at rest (P = 0.04), a higher increase in mean trans-valvular pressure gradient (P < 0.001) at exercise, and smaller exercise-induced changes in global longitudinal strain (P < 0.001) were associated with an abnormal exercise test.
CONCLUSION: In AS, subnormal LV function can be reliably identified by 2D strain imaging at rest and during a sub-maximal exercise. That sensitive measure of LV systolic function is depressed in AS and even more in patients having the most severe AS.
Service de Cardiologie
Researchers ; Professionals
http://hdl.handle.net/2268/109728
10.1093/ejechocard/jeq187
http://ehjcimaging.oxfordjournals.org/content/12/3/235.full.pdf+html

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