Tissue Doppler Imaging In The Evoluation Of Left Ventricular Globle Function By Detecting Aortic Annulus Motion In Patients With Aortic Valve Replacement

Background:The Aortic valve disease is one of the most common Heart valve disease, including Aortic stenosis and Aortic regurgitation. The aortic lesions severity will inevitably lead to hemodynamic changes which can cause the myocardial damage, and then impair cardic function. Clinically, Aortic Valve Replacement is a common operation for the treatment of aortic valve disease, Echocardiogram is an important tool to evaluate the clinical standard after AVR, to detect and analyze the aortic valve and cardiac function index accurately and security. With the rapid development of all kinds of Echocardiogram technology, the expensive equipment, advanced technology and highly-educated personnel are required, so that the application of Echocardiogram technology is limited in clinic. Tissue Doppler Imaging technology is very common in clinic, is simple and convenient, and it can effectively reflect the velocity and direction of myocardial and local structure motions, accurately analyze ventricular wall and valve ring motion state, then we can observe the change of cardiac function. As known that mitral annular motion indexes have been widely applied in the assessment of local and global left ventricular function,and relatively less domestic and foreign researches on aortic annular motion are published, the aortic annular motion indexes are also not comprehensive.This paper explains that we had done related research on the TDI detection of aortic annular motion, we found that the use of TDI detection of aortic annular motion can be used as global left ventricular function assessment index.Objective:To evaluate the global left ventricular function by means of aortic annulus motion using tissue Doppler imaging(TDI) in patients with aortic valve replacement.Methods Totally:20patients with aortic valve replacement and20healthy volunteers (control group) were studied. Basic parameters were detected by two-dimensional and M-mode echocardiography, regional aortic annulus motion profiles of apical5chamber view (A5C) and apical three chamber view (A3C) were obtained in TDI-mode. The peak systolic velocity (AASa), early diastolic velocity (AAEa) and late diastolic velocity (AAAa) of aortic annulus were measured.Results:Compared with control group, the ARD, AO, HR, E in patients with aortic valve replacement did not alter obviously (P>0.05), while IVSd, LVPWd, LVIDd, LVIDs, A, E/Ea and Tei index were significantly higher (P<0.001), aortic annulus TDI parameters were visibly lower (P<0.001). Correlation analysis showed, LVEF and Tei index were clearly negatively correlated (r=-0.514, P=0.001). Conclusions:After aortic valve replacement, the aortic annulus motion of patients visibly reduced, LVEF was significantly lower and Tei index, E/Ea increased. The aortic annulus motion is a new method to assess the changes of global left ventricular function in patients with aortic valve replacement.