الفهرس 
Anatomy of the coronary arteriesOnly 14 pages are availabe for public view
 |  | from | 224 |  |  |
| | | from | 224 | | |
Abstract
The results of our study demonstrated a high accuracy of noninvasive MDCT for the assessment of CABG as well as coronary stents compared with coronary angiography. Detection of graft or stent occlusion were better than detection of substantial stenosis. MDCT angiography is a good negative test as it has a high sensitivity rate since it tends to over estimate stenosis degree, so patients with negative MDCT angiographic results mostly have patent grafts or stents.
The latest MDCT scanners show a potential to become a first-line tool for the noninvasive evaluation and follow up of patients with suspected graft dysfunction or in-stents restenosis. Conventional angiography may be spared for patients with equivocal CT angiographic results (which is a rarity using the 64 MDCT or dual source machines) or who needs an intervention e.g. angioplasty or stent placement within a graft or within a native coronary artery.
We recommend a protocol for dealing with patients after coronary artery grafting or stenting that include using MDCT angiography as a primary modality for confirming their graft or stent patency. A lot of unnecessary invasive conventional angiography will be avoided using MDCT angiography. And in other the patients who need conventional angiography afterwards, CT angiography will be a guide during conventional angiography to save time and contrast to search for occluded stents or grafts with concentrating on the lesions that may need intervention such as angioplasty or stenting.