Abstract
Objective To determine the usefulness of tricuspid annular displacement(TAD),based on twodimensional speckle tracking imaging, for assessment of right ventricular(RV)systolic function.Methods Eighteen patientswith dilated cardiomyopathy and 20 age-matched healthy volunteers were in volved. Twodimensional and real-time three-dimensional(RT3D)imaging were obtained in all patients at apical four-chamber view.The parameters of TAD were derived from off-line QLAB software.RT3D-RV ejection fraction(RVEF)was calculated by using 4D RV function software.Results TAD data were acquired in all 38 cases, while RT3D-RVEF was done in 30 out of 38.The parameters of TAD correlated well with RVEF(P<0.01).The parameters of TAD in dilated cardiomyopathy group were significantly lower than the corresponding values in healthy subjects (P<0.01).The intra-and interobserver variabilities for measurement of TAD were(0.49±2.69)mm and(0.21± 0.60)mm, respectively.Conclusions TAD,based on two-dimensional speckle tracking imaging,proved to be a rapid and reproducible method in determining RV global systolic function. Key words: Echocardiography; Ventricular function,right; Cardiomyopathy,dilated; Tricuspid valve; Speckle tracking imaging
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