The systolic peak velocity(Vs) and the systolic peak displacement(D) in 6 mitral annulus sites were measured with QTVI and TT.

• 应用QTVI及TT获得左心室侧壁、后间隔、前壁、下壁、前间隔、后壁二尖瓣环处的收缩期峰值速度(Vs)、收缩期最大位移(D),6个室壁的平均Vs(AVs)、平均D(AD)。