Evaluation of right ventricular function of patients with intraoperative device closure of atrial septal defect by ultrasonic Doppler tissue imaging

Objective To study the application of Doppler tissue imaging (TDI) in the assessment of right ventricular function of patients with intraoperative device closure of atrial septal defect (ASD). Methods A total of 48 ASD patients, 18 males and 30 females, were selected for intraoperative device closure. The mean age was 31±16 years old. Color Doppler echocardiographic instrument (Sonos 4500) was employed to perform the Doppler tissue imaging before and at 3-5 days after operation. The parameters included: (1) Time and peak speed of systolic motion of anterior tricuspid valve annulus (TDI-TS, TDI-PVS),early diastole motion time (TDI-TE) and late diastolic motion time (TDI-TA) and peak speed of early and late diastolic motion (TDI-PVE, TDI-PVA), interval between the early diastolic motion and late diastolic motion (TDI-TE-A); (2) Peak speed of systolic, early diastolic and late diastolic motions of the middle lateral and basic lateral walls of right ventricle. Results The TDI-PVS(0.16±0.05) m/s in post-operation was decreased than TDI-PVS(0.20±0.04) m/s in pre-operation and TDI-PVA (0.12±0.03) m/s in post-operation was decreased than TDI-PVA (0.16±0.02) m/s in pre-operation apparently (P<0.01). The TDI-TS(231±36) msec in post-operation were shorter than TDI-TS (265±24 )msec in pre-operation(P<0.01). Peak spead of Systolic, early diastolic and late diastolic motions of middle lateral and basic lateral walls of right ventricle declined post-operatively (P<0.01). Conclusion TDI is an effective method to evaluate the function of right ventricle quantitatively in patients with intraoperative device closure of ASD. Key words: Heart septal defects, atrial;  Ultrasonic Doppler Tissue Imaging;  Right ventricular function