We measured M-mode mitral lateral annulus systolic excursion (MAPSE) and Tissue Doppler (TD) peak systolic annular velocity (Sm) in 31 patients with moderate to severe MR and normal EF (59.9 卤 4.7%) candidates for mitral valve repair, preoperatively and 3 months after surgery.
After mitral valve repair, Sm increased from 7.8 卤 1.4 to 9.6 卤 2.2 cm/s (p < 0.0001) and MAPSE increased from 1.33 卤 0.26 to 1.55 卤 0.25 cm (p = 0.0013). EF decreased from 59.9 卤 4.7 to 51.3 卤 5.9%(p < 0.0001). As expected, LV diameters and volumes, wall thicknesses, midwall fractional shortening (mFS), and left atrial (LA) size were all reduced after surgery.
This study suggests that assessment of LV long axis systolic velocity and amplitude of excursion by echocardiography is more sensitive than simple determination of EF for revealing the beneficial impact of MR surgery on overall systolic function.