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Assessment of coronary artery bypass graft patency by multidetector computed tomography and electron-beam tomography

L H Piers1, J Dorgelo, R A Tio

  • 1Department of Cardiology, University Hospital Groningen, Hanzeplein 1, Groningen, RB, The Netherlands 9700. l.h.piers@thorax.azg.nl

The International Journal of Cardiovascular Imaging
|July 28, 2005
PubMed

Insights

Retrospectively ECG-gated multidetector computed tomography (MDCT) and electron-beam tomography (EBT) can effectively assess bypass graft patency. These non-invasive imaging techniques accurately identify graft issues in patients with recurrent angina post-surgery.

Area of Science:

  • Cardiovascular Imaging
  • Medical Diagnostics
  • Radiology

Background:

  • Coronary artery bypass graft (CABG) surgery is a common procedure for treating coronary artery disease.
  • Recurrent angina after CABG can indicate graft failure or stenosis.
  • Accurate assessment of bypass graft patency is crucial for patient management.

Observation:

  • This case report evaluates two tomographic imaging modalities: retrospectively ECG-gated 16-slice multidetector computed tomography (MDCT) and electron-beam tomography (EBT).
  • These techniques were used to assess bypass graft patency in patients experiencing recurrent angina following CABG surgery.
  • The diagnostic performance of MDCT and EBT was compared against traditional coronary angiography.

Findings:

  • MDCT identified occlusion in the left internal mammary artery (LIMA) and a saphenous vein graft in the first patient, findings confirmed by coronary angiography.
  • EBT demonstrated patency of the LIMA and saphenous vein graft in the second patient, with coronary angiography revealing an occlusion distal to the first anastomosis.
  • Both MDCT and EBT provided accurate non-invasive assessments of bypass graft patency.

Implications:

  • MDCT and EBT are suitable non-invasive methods for evaluating bypass graft patency.
  • These advanced imaging techniques can aid in the diagnosis and management of graft-related complications after CABG.
  • Utilizing MDCT and EBT may reduce the need for invasive procedures like coronary angiography in certain clinical scenarios.

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