A clinical study on tricuspid annular displacement predicting the right ventricular function of pulmonary hypertension measured by two-dimensional speckle tracking echocardiography

Abstract

Objective To measure tricuspid annular displacement by two-dimensional speckle tracking echocardiography in pulmonary hypertension (PH) patients, and compare with the right ventricular function parameters, finally discuss the clinical application value of this technology in evaluating the right ventricular function in PH. Methods A total of 58 patients diagnosed or suspected diagnosed as PH were divided into PH group and control group according to pulmonary arterial systolic pressure measured by echocardiography. The right ventricular function parameters included: tricuspid annular plane systolic excursion (TAPSE), right ventricular fractional area change (FAC), tissue Doppler-derived tricuspid lateral annular systolic velocity (s') and right ventricular index of myocardial performance (RIMP). The parameters of tricuspid annular displacement included: the peak systolic tricuspid annular displacement at right ventricular free wall (TMAD1), the peak systolic tricuspid annular displacement at interventricular septum (TMAD2), the peak systolic tricuspid annular displacement at midpoint of tricuspid annulus (TMADm) and the right ventricular longitudinal shortening (TMADm%). Results ① There were significant statistical differences between two groups in TAPSE, RIMP, FAC and s' (P 0.54 and s'<9.5 cm/s, their sensitivities were 81.8%, 84.4%, 85.7% and 72.3% respectively, and their specificities were 72.0%, 73.1%, 70.3% and 100% respectively. Conclusions The tricuspid annular tissue displacement parameters can predict the decrease of right ventricular function in patients with PH, and provide a new diagnostic index for clinical treatment and prognosis. Key words: Echocardiography; Pulmonary hypertension; Tissue motion annular displacement; Ventricular function, right; Speckle tracking imaging