Although important advances in echocardiographic images have taken in the last 15 years, clinical evaluation of segmental function must rely on visual assessment. Recent studies have shown that Doppler Tissue Imaging (DTI) can be used to evaluate the r~~ional LV wall motion dynamics in the cardiac cycle quantitatively. Myocardial Velocity Gradient (M vG) has potential for the quantitative assessment of regional Left Ventricular (LV) contraction abnormalities in patients with Ischemic Heart Disease (IHO).
OBJECTIVE: The aim of this study was to determine whether MVG, assessed by pulsed wave OTI could be of clinical relevance and represent reliable indicators of regional LV function after successful myocardial revascularization.
PATIENTS AND METHODS: Thirty five Patients with IHO undergoing PCI or CABG were studied. They were divided into two Groups: group (I) included 20 Patients which subdivided into 3 subgroups according to target vessel: subgroup (A): included 7 Patients to whom PCI were done for LAD, subgroup (B): included 7 Patients to whom PCI were done for LCX, subgroup (C): included 7 Patients to whom PCI were done for LAD & LCX. Group (II) included 15 Patients to whom CABG were done. Conventional 20 Echo and pulsed wave OTI were obtained from 16 segments of LV in different views and Segmental wall Motion Score (SWMS) and MVG were measured in the 16 segments of LV. MVG was measured as the slope of regression line of the velocity profile across the myocardial wall in systole, its normal range from 1- 3.85s• .
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