Longitudinal Ventricular Function In Atrial Septal Defect Assessed By Velocity Vector Imaging(VVI)

ObjectiveTo assess the longitudinal function of left and right ventricle in patients with atial septal defect before and after Percutaneous Closure.Methods23 patients with ostium secundum defect and 23 healthy people were evaluated by both conventional echocardiography and Velocity Vector Imaging(VVI).They were matched with for sex,age.Exclusion criteria for all subjects were complicating with other complex cardiac conformations,HBP,cardiac valve disease,congenital heart disease,Diabetes mellitus,thyroid disease,metabolic disease,connective tissue disease,dystrophy,severe dysfunction of liver and kidney,endocarditis or other infectious diseases,contact of toxic,alcohol abuse,pregnant woman in perinatal period.Below three group indexes were obtained from 1 heart beat in 11 segments respectively to assess left and right ventricular longitudinal contraction and relaxation.â… -systolic max velocity(SVmax),systolic max strain(SSmax),systolic max strain rate(SSRmax);â…¡-end diastolic max velocity(DVmax),end diastolic max strain(DSmax),end diastolic max strain rate(DSRmax);â…¢peak time of velocity(PTV),peak time of strain(PTS),peak time of strain rate(PTSR). ResultsCompared with normal group,regional right ventricle longitudinal function in ASD before Percutaneous closure were significantly higher,regional left ventricle longitudinal function in ASD before Percutaneous closure were significantly lower.The regional right ventricle longitudinal function in ASD after Percutaneous closure group presented significantly reduced velocity,strain and SR values campared with ASD before Percutaneous closure,but still higher than the normal group,especially in the base segment.The regional left ventricle longitudinal function in ASD after Percutaneous closure group still presented significantly higher velocity,strain and SR values campared with ASD before Percutaneous closure,but still lower campered with normal group.ConclusionsVelocity Vector Imaging(VVI)method provides simutaneous quantitation of global and regional ventricle function of atrial septal defect before and after Percutaneous closure.