Academic Editor: Takatoshi Kasai
Background: Mitral valve (MV) morphology after MV repair affects
postoperative left ventricular (LV) blood flow pattern and long-term cardiac
function. Pilot data suggest that LV diastolic vortex flow pattern changes after
operation, but specific quantifiers remain unknown. We aimed to explore the role
of vector flow mapping (VFM) in LV diastolic vortex flow pattern in patients who
underwent MV repair. Methods: A total of 70 patients with degenerative
mitral regurgitation were consecutively enrolled and 30 age- and gender-matched
controls were recruited. 50 Patients who underwent MV repair were eventually
included in our study. LV average energy loss (EL-AVE) during diastole was
measured in the MV repair group by VFM one week before and one month after the
operation, and compared with that of controls using one-way analysis of variance.
The effect of surgical techniques and the extension of leaflet degeneration on
postoperative EL-AVE were analyzed using muti-way analysis of variance, and
patients were categorized into a resection subgroup (n = 29) and a non-resection
subgroup (n = 21). Results: The EL-AVE one month after operation in the
MV repair group was decreased (p