Quantitative analysis of strain and strain rate of left ventricle in healthy subjects

Objective:To investigate the normal reference value range and the variations of strain and strain rate in left ventricle in healthy subjects.Methods:Using the technique of tissue Doppler imaging to carry on quantitative analysing strain and strain rate of every section of left ventricle.Results:The peak systolic strain rate values and strain values in apex-mid-basis segment have not significant difference.Septal strain rate values are higher than the values of lateral and posterior walls,but the differences have no significance.Strain values are similar in corresponding segments of the lateral,posterior and anterior walls,but higher for the septum.Conclusion:Septal strain value is the highest in all left ventricular walls.Strain rate and strain values are no significant differences in the other left ventricular walls.Using strain and strain rate imaging can quantitative analysis regional myocardial deformation,they are the robust technique for quantifying regional myocardial function in clinical application.