Korean J Thorac Cardiovasc Surg.  2006 Jan;39(1):42-47.

Comparison of Multidetector Computed Tomography with Coronary Angiography for Evaluation of Coronary Artery Bypass Grafts

• Yoo BS
• Shin YC
• Kim KI
• Kim EJ
• Chee HK

Abstract

BACKGROUND: The new Multidetector Computed Tomography (MDCT) is useful in visualization of complex coronary artery anatomy. We investigated usefulness comparing of invasive coronary angiography with noninvasive MDCT in judgment of functional degree of coronary arteries grafts after coronary artery bypass graft operation. MATERIAL AND METHOD: We analyzed the patency of 52 conduits from 15 patients whom consented to take both 32 Channel MDCT and coronary angiography from November 2003 to November 2004. Comparisons were performed for sensitivity, specificity, positive prediction value and negative prediction value between coronary angiography and 3 dimensional reconstruction image using MDCT. RESULT: The average graft used was 3.4+/-0.8 per patient. Average heart rate during MDCT was 86/minute (Range, 60~110/minute) without administration ofbeta-blocker. All patients could hold breath as much as necessary. The average graft patency obtained through coronary angiography was 96.2%. In MDCT group, the sensitivity, the specificity, the positive predictive value and the negative predictive value for diagnosis was 100%, 98.0%, 100% and 66.6% respectively.
CONCLUSION
The effectiveness of 32 Channel MDCT may be compared to coronary angiography in grasping about patency and bloodstream of graft conduits after coronary artery bypass graft. Also MDCT has the advantage of noninvasiveness and inexpensiveness compared to coronary angiography.

Keyword

Coronary artery bypass; Computed tomography; Vascular patency

MeSH Terms

Coronary Angiography*
Coronary Artery Bypass*
Coronary Vessels*
Diagnosis
Hand Strength
Heart Rate
Humans
Judgment
Multidetector Computed Tomography*
Sensitivity and Specificity
Transplants
Vascular Patency