Assessment Of Right Ventricular Regional And Total Function In Patients With Coronary Artery Disease Using Quantitative Tissue Velocity Imaging

Objective : To investigate the value of quantitative tissue velocity imaging (QTVI) in assessing the Right ventricular (RV) regional and total function in patients with coronary artery disease (CAD) .Methods : 30 normal subjects and 30 patients with angina and 30 patients with myocardial infarction were studied by QTVI, measured velocity of systole (Vs),early diastole velocity(Ve),lated diastole velocity (Va), Ve\Va, the RV isovolumetric contraction time(ICT), isorolumetric relaation time (IRT), the ejection (ET), diastole filling time (DFT), the Q-Tei index and Z index. obtained pw-Tei index form the pulse-wave Doppler.Results: The RV Vs,Ve,Va had no difference in angina patients compared with normal subjects(P>0.05),Ve/Va was higher in patients with angina patients than that in normal group(P<0.05)The RV Vs,Ve,Ve/Va,was shorter, Va was higher in patients with myocardial infarction than that in normal group(P<0.05).The RV ICT and IRT, DFT had no difference in angina patients compared with normal subjects(P>0.05,Q-Tei index,PW-Tei index were higher and Z index was lower than that in normal group(P<0.05). The RV ICT,IRT was longer,ET,DFT was shorter in patients with myocardial infarction than that in normal group(P<0.05). Q-Tei index, PW-Tei index were higher and Z index was lower than that in normal group and angina(P<0.05). Q-Tei index showed significant positive correlation with PW-Tei index(r=0.763,P<0.05).Conclusions: CAD caused right ventricular regional diastolic and systolic funetion impaired,QTVI is a sensitive,rapid,non-invasive method to assess the right ventricular regional diastolic and systolic function in CAD patients.