Abstract
Purpose. Comprehensive echocardiographic assessment of left ventricular (LV) systolic function in patients with moderate mitral regurgitation before and after
surgical revascularization and mitral annuloplasty.
Material and methods. The study involved 58 patients with moderate mitral insufficiency and no signs of significant left ventricular remodeling. Depending
on the operating surgeon tactics against further intervention on the mitral valve patients were divided into 2 groups of observations: group 1 (n=28) – isolated
coronary artery bypass grafting; group 2 (n=30) – coronary artery bypass grafting and mitral annuloplasty. In echocardiographic evaluation included standard
measurement and assessment of global and segmental left ventricular function, as well as the use of techniques speckle tracking and tissue Doppler to
measure speed of the fibrous ring of the mitral valve.
Results. The result was a significant decrease in overall left ventricular ejection fraction (LVEF) in group 2 in the early postoperative period. In the mid-term
total LVEF has improved, but did not reach baseline values. Also in the early period of observation calculated LVEF showed significant improvement compared
with baseline, but did not change significantly with further observation and was comparable to the control group. Compared with the original data in
the early period of observation there was a reduction of global longitudinal strain in both groups, but more pronounced in group 2. In the medium to longterm
follow global longitudinal strain showed an increase, but remained lower than baseline.
Conclusions. Some parameters, such as left ventricular end-systolic volume, are dependent on afterload affect the accuracy in the evaluation of left ventricular
systolic function to mitral valve annuloplasty. LV global longitudinal strain indicators may help to identify LV dysfunction at an early stage, before it happens
a significant and irreversible myocardial injury.
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