الفهرس 
Cardiac MR radiological anatomyOnly 14 pages are availabe for public view
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Abstract
The identification of myocardial viability in the setting of left ventricular (LV) dysfunction is crucial for the prediction of functional recovery following revascularization. Although echocardiography, and nuclear imaging have validated roles, recent advances in cardiac magnetic resonance (CMR) technology and availability have led to increased experience in CMR for identification of myocardial viability. Also, magnetic resonance imaging provides not only morphological, but also functional and metabolic information on the heart; thus, MRI offers several unique capabilities for the assessment of myocardial viability and will probably become the method of choice in the near future.
Assessment of myocardial viability by MRI can be performed by measurement of end-diastolic wall thickness, low-dose dobutamine stress, and imaging of first-pass perfusion and late enhancement after contrast.
The aim of this study was to assess the role of cardiac MRI as a non-invasive tool in the evaluation of myocardial viability in patients with ischemic heart disease.
This study included 25 patients clinically diagnosed as having ischemic heart disease; 22 males and 3 females with age ranged from 28 to 68 years (mean age 48 years).
Summary and conclusion
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Chapter 9
The examination protocol for the assessment of myocardial viability consisted of cine MRI for t/he assessment of regional and global cardiac function. In acute/subacute myocardial infarction, T2-weighted imaging with fat suppression was applied to differentiate acute necrosis accompanied by myocardial edema from chronic scar without edema. Also, imaging of early and late enhancement were performed.
Left ventricular ejection fraction correlated moderately well between cMRI and echocardiography however, echo underestimated LVEF compared to cMRI by about 4.05%.
cMRI showed higher sensitivity and specificity as regard the detection of SWMA for the prediction of scar tissue that were diagnosed by cMRI.
cMRI was valuable in the detection of end diastolic wall thickness as a predictive value for myocardial viability in chronic cases while echocardiography couldn’t detect most of these cases due to high spatial resolution of cMRI and the excellent visualization of the myocardium and its endo- and epicardial borders in contrast to echocardiography in which difficulties in defining endocardial contours were sometimes found in patients with limited image quality with poor echo imaging window as seen in patients having