Coronary artery bypass grafts: evaluation of patency with cine MR imaging

White, RD; Pw, Pflugfelder; Mj, Lipton; Higgins, C B

doi:10.2214/ajr.150.6.1271

Cited by 99 publications

(18 citation statements)

References 2 publications

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“…Furthermore, their predictable and less convoluted course has allowed MR imaging even with more conventional techniques for over a decade. Both ECG-gated spin-echo [19,24,48,66] and gradient-echo [2,19,67] techniques have been used to assess bypass graft patency. By visualizing rapid blood flow in at least 2 locations along its expected course, one can conclude that there is flow present through the bypass graft, suggestive of patency.…”

Section: Abbildungmentioning

confidence: 99%

Coronary MR Angiography: Current Status

Danias

Manning

2000

Herz

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Since first described in the early 1990's, coronary magnetic resonance angiography (MRA) has evolved as a promising noninvasive modality for imaging of the coronary arteries and evaluation of coronary artery disease. Despite technical limitations, coronary MRA has established value for imaging of anomalous coronary arteries and assessment of bypass graft patency. Current research focuses on the development of optimal respiratory compensation strategies, improved spatial and temporal resolution and faster acquisition of image data. The accurate detection of stenoses and assessment of the severity of coronary atherosclerosis is presently being evaluated with large multicenter studies. With further technique enhancements and more clinical experience, coronary MRA is likely to become the dominant noninvasive modality in clinical cardiology.

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Section: Abbildungmentioning

confidence: 99%

Coronary MR Angiography: Current Status

Danias

Manning

2000

Herz

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“…201 The relatively stationary position of saphenous vein and internal mammary artery bypass grafts offsets many of the technical challenges of native vessel coronary MRA. Furthermore, their relatively straight and predictable course has allowed imaging of bypass grafts with conventional ECGgated spin-echo [202][203][204][205] and gradient-echo 202,206,207 MR techniques. For most of these investigations, contiguous transverse images are obtained at levels corresponding to that expected for the bypass graft.…”

Section: Yucel Et Al Magnetic Resonance Angiographymentioning

confidence: 99%

Magnetic Resonance Angiography

Yucel¹,

Anderson²,

Edelman³

et al. 1999

Circulation

125

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“…The first pioneers in the field of graft MR angiography used nonrespiratory-compensated, ECG-triggered, 2-D spinecho, 4 -6 and gradient-echo techniques, 6,19,20 and later on, breath-hold 2-D gradient-echo sequences with k-space segmentation were applied. 21 When 2 successive proximal slices showed a patent vessel, it was concluded that the graft was patent.…”

Section: Previous Experience In Mr Angiography Of Graftsmentioning

confidence: 99%

Detection of Vein Graft Disease Using High-Resolution Magnetic Resonance Angiography

et al. 2002

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Background-The application of previous magnetic resonance (MR) angiography techniques has enabled noninvasive differentiation between patent and occluded coronary artery bypass grafts. However, the detection of graft stenosis remains difficult. The purpose of our study was to determine the accuracy of high-resolution navigator-gated 3-dimensional (3-D) MR angiography in detecting vein graft disease. Methods and Results-MR angiography was performed in addition to coronary angiography with quantitative coronary analysis in 56 vein grafts from 38 patients (mean age 66.6Ϯ9.3 years), who presented with recurrent chest pain after bypass surgery. Eighteen grafts showed a luminal stenosis Ն50%, 11 grafts a stenosis Ն70%, and 6 grafts were occluded. All MR angiograms were evaluated independently by 2 blinded observers, who scored the presence of graft occlusion and graft stenosis Ն50% and Ն70% with a confidence level of 1 to 10. MR image quality was judged as insufficient in 6 grafts and these were excluded. Receiver-operator characteristic analysis revealed an area under the curve of 0.89 and 0.89 for identifying graft occlusion, 0.81 and 0.87 for stenosis Ն50%, and 0.82 and 0.79 for stenosis Ն70% for the 2 observers, respectively. Interobserver agreement in assessing graft occlusion and stenosis Ն50% and Ն70% was 94% (ϭ0.74, rϭ0.81), 72% (ϭ0.40, rϭ0.66), and 82% (ϭ0.53, rϭ0.72)

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Coronary artery bypass grafts: evaluation of patency with cine MR imaging

Cited by 99 publications

References 2 publications

Coronary MR Angiography: Current Status

Coronary MR Angiography: Current Status

Magnetic Resonance Angiography

Detection of Vein Graft Disease Using High-Resolution Magnetic Resonance Angiography

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