Evaluation of Left Ventricular Myocardium Strain in Healthy People by Using Two-dimensional Speckle Tracking Imaging

Objective To assess the characteristics of left ventricular myocardium strain in healthy people by using two-dimensional speckle tracking imaging(STI).Methods The images were recorded at the left ventricular long and short-axis view.The peak systolic radial strain(RS),circumferential strain(CS),and longitudinal strain(LS)were measured by using 2D strain software in 50 normal subjects.Results The LS,RS and CS values of the inner layers in corresponding segments at different levels were higher than those of the outer layers(P0.05).The values of LS were increased from the base to the apex(P0.05).The RS values at the same level of different segments had no significant dif-ference.The CS value of anteroseptal at the apex level was higher than that of the other segments.Conclusion STI has great value in quanti-tative analysis of the regional wall function of the left ventricule because it can measure the 2D strain value exactly.