Comparative Study To Evaluation The Changes Of Left Ventricular Torsional Deflection In Patients Undergoing Transcatheter Closure Of ASD Using Speckle Tracking Imaging

Object: To investigate the left ventricular rotation and twist in patientswith atrial septal defect (ASD)after percutaneous closure of ASD.Method: Selection30patients as the case group, which is divided intopreoperative group (group A), the3rd after closure (group B), the6th afterclosure (group C). Selection of30cases of healthy volunteers as control group(N group), measured the left ventricular the rotation of6segements of basaland apical short-axises in each groups, left ventricular basal short-axis level,apical short-axis of the section the rotation angles and reach peak systolic time,measuring systolic left ventricular overall reverse angle; Paint a left ventricularbasal short-axis level and apical short-axis department short-axis horizontalsystolic rotation angle-time curves; Double plane Simpson method ofmeasuring the conventional parameters.Results:(1) A group of each routine parameters measuredvalues(LVEDV,LVESV,LVSV),compare with N, A group of reducing (p <0.05); B group of each routine parameters measured values compare with Agroup rising (p <0.05), but less than N group (p <0.05); The group Cmeasurements basic close to N group; But the left ventricular ejection fractiondoes not change significantly.(2) A group of left ventricular basal short-axisexcept the front wall, each segmental systolic over clockwise rotation anglepeak below N group (P <0.01), former wall rotation angle and minimize peak,but difference was statistically significant; Group B left ventricular basal short-axis level except antetheca, each segmental systolic clockwise rotation anglethan that of group A rising (P <0.01), former wall rotation angle increased, but the peak difference was statistically significant, but still lower than the N group;Group C left ventricular basal short-axis level except antetheca, each segementclockwise angle is more than peak group B (P <0.05), former wall rotationangle increased, but the peak difference was statistically significant, and hasbasic close to N group.(2) A group of left ventricular apical short-axis leveleach segmental systolic counterclockwise rotation angle is slightly lower peakN groups, the difference was not statistically significant. Group B leftventricular apical short-axis level each segmental systolic counterclockwiserotation angle is group A slightly elevated peak, but less than N groups, thedifference was not statistically significant. Group C left ventricular apicalshort-axis level horizontal systolic counter-clockwise angle is a slightlyelevated, and has set up a file basic close to N groups, the difference was notstatistically significant.Conclusion: The research confirms application2D speckle trackingtechnology (STI) can measure percutaneous intervention before sealing afterleft ventricular basal parts, apical short-axis department of rotation and leftventricular overall reverse angle to assess capacity load increases and rightventricular to left ventricular reconstruction of the rotary motion and leftventricular overall twisting movement influence.