Recovery of long-axis left ventricular function after aortic valve replacement in patients with severe aortic stenosis
Background: Patients with aortic stenosis (AS) should undergo aortic valve replacement (AVR) before irreversible LV dysfunction has developed. Assessment of long-axis left ventricular (LV) function may assist in proper timing of AVR. Objectives: To assess serial changes in long-axis LV function before and after AVR in patients with severe AS and preserved LV ejection fraction. Methods: The study comprised 27 consecutive patients (mean age 64.9 ± 11.7 years, 15 males) with symptomatic severe AS, scheduled for AVR. Seventeen subjects without known cardiac disease, matched for age, gender, LV ejection fraction and cardiovascular risk factors, served as a control group. Long-axis LV function assessment was done with tissue Doppler imaging at 3 weeks, 6 months, and 12 months after AVR. Results: Mean aortic valve area in the AS group was 0.70 ± 0.24 cm2. Pre-AVR peak systolic mitral annular velocities were significantly lower compared to controls (6.7 ± 1.5 vs. 8.9 ± 2.0 cm/s, P < 0.05). Post-AVR peak systolic mitral annular velocities improved to 9.1 ± 2.9 at 3 weeks, 8.6 ± 2.7 at 6 months, and 8.1 ± 1.7 cm/s at 12 months (P < 0.05). Improvements were seen over the whole range of pre-AVR peak systolic mitral annular velocities. Patients with improved Sm after AVR (defined as ≥10% compared to baseline values) did not differ in baseline characteristics as compared to those who did not improve. Conclusions: In patients with severe AS and preserved LV ejection fraction, abnormal systolic mitral annular velocities improve after AVR, independent of the pre-AVR value.
|Keywords||aortic stenosis, aortic valve disease, aortic valve replacement, tissue Doppler|
|Persistent URL||dx.doi.org/10.1111/j.1540-8175.2010.01224.x, hdl.handle.net/1765/28012|
|Journal||Echocardiography: a journal of cardiovascular ultrasound and allied techniques|
Galema, T.W, Yap, S-C, Soliman, O.I.I, van Thiel, R.J, ten Cate, F.J, Brandenburg, H.J, … Geleijnse, M.L. (2010). Recovery of long-axis left ventricular function after aortic valve replacement in patients with severe aortic stenosis. Echocardiography: a journal of cardiovascular ultrasound and allied techniques, 27(10), 1177–1181. doi:10.1111/j.1540-8175.2010.01224.x