A Clinic Compare Of Doppler Tissue Imaging And Omnidirectional M Mode Echocardiography On The Assessment Of Left Ventricular Diastolic Function

Backgroungs: Epidemiologic data indicate that Left ventricular (LV) diastolic dysfunction (DD) and diastolic heart failure (HF), that is symptomatic DD and a distinct form of heart failure, are very common 40-50% of patients with chronic heart failure have normal or relatively normal left ventricular ejections fractions. LVDD and LVHF are due to the abnormality of myocardial diastolic properties, such as abnormal myocardial relaxation, decreased compliance, and increased filling pressure. The uncontrolled hypertension associated to LV concentric remodelling is the main determinant of LVDD but several other cardiac diseases, including myocardial ischerma, and extra-cardiac pathologies involving the heart are other possible causes. Diastolic left ventricular function is commonly characterized by transmitral flow pattern. Recently, Doppler tissue imaging (DTI) of mitral annular velocity and Omnidirectional M mode echocardiography was introduced to evaluate diastolic function.Objective To investigate the differences on asses the left ventricular diastolic function by tissue Doppler image and omnidirectional M mode Echocardiography.Methods This study included 29 patients who underwent left-sided cardiac catheterization with left ventricular diastolic dysfunction divided into three groups: relaxation delaying (group A, 11 cases); pseudonormal filling(group B, 12 cases); restrictively filling (group C, 6 cases),and 15 normal control subjects were studied with tissue Doppler image and omnidirectional M mode echocardiography. Tissue Doppler image data including Ea and Aa were acquire from mitral annular on apical four-chamber left ventricular two-chamber and apical three-chamber and the Ea/Aa ratio was calculated. The maximum systolic velocities (VS) and early-diastolic velocities (VD) of 6 regional left ventricular segments at short-axis sections of papillary muscle level were measured by omnidirectional M mode echocardiography, and the VD/Vs ratio was calculated.Results the specificity was 96.7% and 94.4% by two moths, respectively. the sensitivity was 71.2%, 90.3% and 97.7% by tissue Doppler image in each group, respectively. Taking VD/ Vs≤1.0 to diagnose diastolic function, the sensitivity was 56.1%, 65.3% and 96.5% by omnidirectional M mode echocardiography in each group, respectively.Conclusions The two methods can be regarded as valuable methods for estimating left ventricular diastolic function. DTI is sensitive in comparison with omnidirectional M mode Echocardiography.