Study of left ventricular diastolic function in patients with myocardial infarction using vector flow mapping / 中华超声影像学杂志

ABSTRACT

Objective To assess the clinical application value of vector flow mapping (VFM) in evaluation of left ventricular diastolic function in patients with myocardial infarction(MI).Methods Fifty patients with MI were enrolled as patients group.Sixty healthy people were enrolled as control group.The quantitative parameters,including position of vortex,the number of laps,the half-value area (S),Diameter of half-value area of vortex (D),the maximum flow volume of vortex (Qmax),and vortex intensity (Qmax/S)were measured in the VFM imaging mode and vortex mode.Difference of the parameters was evaluated between two groups.Ea/Aa were derived via TDI.And correlation analysis was performed between Ea/Aa and Qmax/S.Results Vortex were close to midline and apex cordis.Qmax/S in patients group were decreased,but the number of turns and S and D in patients group were increased.Qmax was changed during different periods of different vortex.Qmax/S had a good correlation with Ea/Aa.Conclusions VFM is a new accurate way for clinical to analysis quantificationally left ventricular blood flow structure and provides quantitative index.