الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Coronary artery ectasia (CAE) is an uncommon coronary artery disease characterized by the abnormal diffuse dilatation of one segment or more than one segment of coronary artery to 1.5 times or more the size of adjacent normal segment of the artery. (Lin. et al.2008).The disease is commonly asymptomatic and is normally discovered accidentally when performing cardiology investigations for conditions such as coronary artery disease, stable angina and other acute coronary syndromes. (Hsu, et al 2014) Pulsed wave tissue Doppler imaging is useful complement to standard echo -Doppler examination and a helpful tool in diagnosis and prognosis of CAD. TDI- MPI is considered a reliable parameter for evaluation of global left ventricular function. Pulsed wave tissue Doppler has proved useful in the evaluation of the isovolumic indices, which correlate well with left ventricular global contractility and the usefulness of myocardial performance index using PWD by TDI in early detection of left ventricular dysfunction. Tissue Doppler Imaging (TDI) allows for the visualization of tissue movement typically performed on the myocardium. This tool is typically used to assess levels of diastolic function of the left ventricle by placing a sample volume at the mitral valve annulus, where changes in tissue motion are often detected prior to changes in blood flow spectrums through the same valve.