Detection of Coronary Bypass Graft patency by 256-Slice Multi-detector Computed Tomography

Abstract

To evaluate the diagnostic accuracy of 256-slice Multidetector Computerized Tomography (256-MDCT) in detection of coronary graft patency by comparison with the gold standard invasive coronary angiography (ICA). MATERIALS AND METHODS.From January 2009 to April 2011, a total of 29 consecutive patients who had previously had CABG surgery were referred to us for assessment of graft patency. A total of 84 coronary bypass graft conduits (38 arterial graft conduits, 46 venous graft conduits) were studied, using 256-MDCT and ICA with iodine contrast intravenous injection. All patients underwent coronary angiography to either confirm result or PCI of graft disease. The diagnostic accuracy of the 256-MDCT for coronary bypass graft evaluation was assessed by comparing it to the ICA in terms of sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV).