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Delayed Enhancement Magnetic Resonance Imaging Findings in Cardiac Amyloidosis  

Song, Jin Hwa (Department of Radiology, Seoul National University Hospital)
Park, Eun-Ah (Department of Radiology, Seoul National University Hospital)
Lee, Whal (Department of Radiology, Seoul National University Hospital)
Chung, Jin Wook (Department of Radiology, Seoul National University Hospital)
Park, Jae Hyung (Department of Radiology, Seoul National University Hospital)
Publication Information
Investigative Magnetic Resonance Imaging / v.17, no.1, 2013 , pp. 33-40 More about this Journal
Abstract
Purpose : To evaluate late gadolinium enhancement (LGE) pattern of left ventricular (LV) myocardium and presence or absence of LGE in other regions of the heart on cardiac magnetic resonance (CMR) imaging in patients diagnosed with cardiac amyloidosis. Materials and Methods: From 2009 to 2011, 9 patients who were suspected cardiac amyloidosis underwent CMR. We retrospectively analyzed the presence or absence of LGE and enhancement pattern in LV myocardium, and the presence or absence of LGE in other chambers as well. Also we measured interatrial septal thickness (IST), relative signal intensities of atrial septum and epicardial fat over the left atrial (LA) cavity on delayed enhanced images. MRI parameters in these patients were compared to those of control group of patients with ischemic heart disease by Wilcoxon rank sum test. Results: Of nine patients, LGE were found in 8; subendocardial circumferential pattern in 4 and diffuse pattern in 4. LGE in right ventricle was observed in 7. IST was significantly increased in patients with cardiac amyloidosis (P = 0.02). Ratio of atrial septum to LA cavity and ratio of epicardial fat to LA cavity showed a significant difference (P = 0.0002 and P = 0.0006, respectively). Conclusion: In LGE CMR, subendocardial or diffuse enhancement pattern is a typical finding for patients with cardiac amyloidosis. Atrial septum and epicardial fat show relatively increased signal intensities over LA blood cavity.
Keywords
Cardiac MR; Delayed enhancement; Cardiac amyloidosis;
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