ROLE OF 64-SLICE MULTI DETECTOR COMPUTED TOMOGRAPHY FOR NON-INVASIVE VISUALISATION OF CORONARY ARTERY BYPASS GRAFTS FOR FOLLOW UP IN POST CABG PATIENTS
AbstractBackground: Coronary artery bypass graft surgery is a commonly performed revascularizationprocedure in ischemic heart disease patients. Conventional coronary angiography is an invasivemethod for evaluation of grafts in such patients. Non-invasive evaluation of grafts in post CABGpatient has been made possible with the advent of 64-Slice Multi Detector Computed Tomography(MDCT) .The Objective of the study was to non-invasively assess the graft patency with MDCT.Methods: Sixty post CABG patients (52 male, 8 female) with atypical chest pain or stable anginawere evaluated with MDCT for graft patency. The grafts were considered as patent if there wascontinuous lumen visualisation at origin, in the body and at its insertion with native recipientvessels. Grafts were defined as blocked when only stumps were seen. They were classified asstenotic if there was ≥50% diameter narrowing. Results: The mean age of the patients was60.1±9.7 years, mean duration since CABG was 8.01±6 years. Total number of grafts assessedwas 175 including 124 (71%) venous grafts and 51 (28.9%) arterial grafts. A total of 82/124(66.1%) venous grafts and 47/51 (92%) arterial grafts were patent. Forty-two (34%) venous graftswere blocked whereas 4 arterial grafts were not developed. Arterial grafts patency was 92% andvenous grafts patency was 67.7% after a mean follow up of 8.01±6 years. Conclusion: The studyshows that 64 slice MDCT can be used for the evaluation of patency and occlusion of venous andarterial grafts in post CABG patients for follow up.Keywords: Multi Detector Computed Tomography (MDCT), Coronary Artery Bypass Graft(CABG), Graft Patency (GP)
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