Clinical Study On Strain Rate Imaging Of Atrial Septum

Background and objectivesStrain rate imaging (SRI) or strain imaging (SI) is a new assessment of regional myocardial wall deformation based on Doppler tissue velocity imaging (TVI). SRI profited from high time and spatial resolutions is relatively immune to cardiac translational motion and tethering, which can quantify systolic and diastolic deformation of regional myocardium accurately during the entire cardiac cycle. As the reservoir, conduit and pump of the blood, Atrium following deformation is important to substain the heart function. It would lead to dysfunction of the atrium if continue increasing to the atrial volume and descend of atrial emptying due to increasing afterloading condition based on left ventriclar diastolic dysfunction. Evaluation for atrial function has potential clinical advantages in assessing such disease. Conventional two dimension echocardiography and Acoustic Quantification (AQ) based on automatic boundary detection of the endocardial border can initially assess the function of left atrium and left ventricular diastolic period by measuring the variation of left atrial volume, but cann't reflect the atrial myocardial deformation directly. In this study, we...