A Research Of Left Ventricular Long-axis Systolic Rules In Normal Subjects And Its Clinical Value By Doppler Tissue Imaging

Objective:To evaluate the left ventricular Long-axis systolic rules using Doppler Tissue Imaging and to investigate its clinical value.Methods:Totally80patients with coronary artery disease and60healthy volunteers were enrolled. Peak systolic velocity (Sm) were measured at mitral, papillary muscle and apex value in different left ventricular walls using Doppler Tissue Imaging. At the same time we analysed the dates we acquired to discuss the rules of the left ventricular Long-axis systolic.Results:Regularity of myocardial wall velocity profiles in normal subjects was found in each cardiac cycle. Isovolumic contractive wave (IVC)、systolic wave (S) during systolic period and isovolumic relaxation wave (IVR)、early diastolic wave (E)、reverse wave (R)、atrial contractive wave (A) during diastolic period were showed in sequence. Through the comparison of Peak systolic velocity(Sm) we found that:①The movement of mitral segment is fastest. The papillary muscle segment is the second and the apex segment is the slowest.(2)LVIW>LVLW>LVAW>IVS in the same healthy volunteer.③Sm was reduce in the condition with coronary artery disease.Conclusions:Doppler Tissue Imaging can provide us a quantitative, direct and accurate method to assess left ventricular myocardial segment velocities. TDI is important in diagnosis of coronary heart disease.