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Pseudoaneurysms at aortic cannulation site after coronary artery bypass graft: MR findings
P K Woodard1, E F Patz, H D Sostman
1Department of Radiology, Duke University Medical Center, Durham, NC 27710.
Abstract:
Pseudoaneurysm at the aortic cannulation site is a rare but potentially fatal complication of coronary artery bypass surgery. We present two cases in which MRI provided significant information regarding the anatomy and extent of a pseudoaneurysm. In one case both spin-echo imaging and cine MRI with and without gradient moment nulling (flow compensation) were used. The absence of gradient moment nulling in cine MRI provides additional contrast between flowing and static blood. This contrast may complement conventional cine images with gradient moment nulling, providing further information.
Insights
Pseudoaneurysms after coronary artery bypass surgery can be fatal. Magnetic resonance imaging (MRI) effectively visualized pseudoaneurysm anatomy and extent, aiding diagnosis.
Area of Science:
- Cardiovascular Surgery
- Diagnostic Imaging
- Medical Imaging
Background:
- Pseudoaneurysm at the aortic cannulation site is a rare but serious complication following coronary artery bypass surgery (CABG).
- Early and accurate diagnosis is crucial for managing this potentially fatal complication.
Observation:
- This report details two cases of pseudoaneurysm following CABG where magnetic resonance imaging (MRI) was utilized.
- Specific MRI techniques, including spin-echo imaging and cine MRI with and without gradient moment nulling (flow compensation), were employed.
Findings:
- MRI provided significant anatomical and extent information regarding the pseudoaneurysms in both cases.
- The absence of gradient moment nulling in cine MRI enhanced contrast between flowing and static blood, offering complementary diagnostic information.
Implications:
- MRI is a valuable tool for diagnosing and assessing aortic pseudoaneurysms post-CABG.
- Modified cine MRI techniques without gradient moment nulling can improve visualization and diagnostic confidence.