Arrhythmogenic right ventricular dysplasia cardiac MRI: Difference between revisions
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== Overview == | == Overview == | ||
Among all the imaging modalities, MRI may be the most useful establishing the diagnosis of ARVD. Among patients with ARVD, fatty infiltration of the RV free wall | Among all the imaging modalities, MRI may be the most useful establishing the diagnosis of ARVD. Among patients with ARVD, fatty infiltration of the RV free wall may be visible on cardiac MRI as a bright area of hyperenhancement. Fat has increased intensity in T1-weighted images. However, the fat may be difficult to differentiate intramyocardial fat and the epicardial fat that is commonly seen adjacent to the normal heart. Also, the sub-tricuspid region may be difficult to distinguish from the atrioventricular sulcus, which is rich in fat. Cardiac MRI can visualize the extreme thinning and akinesis of the RV free wall. However, the normal RV free wall may only be about 3 mm thick, rendering the test less sensitive. | ||
Cardiac MRI can visualize the extreme thinning and akinesis of the RV free wall. However, the normal RV free wall may be about 3 mm thick, | |||
==MRI Examples== | ==MRI Examples== |
Revision as of 20:46, 26 September 2012
Arrhythmogenic right ventricular dysplasia Microchapters |
Differentiating Arrhythmogenic right ventricular dysplasia from other Diseases |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Among all the imaging modalities, MRI may be the most useful establishing the diagnosis of ARVD. Among patients with ARVD, fatty infiltration of the RV free wall may be visible on cardiac MRI as a bright area of hyperenhancement. Fat has increased intensity in T1-weighted images. However, the fat may be difficult to differentiate intramyocardial fat and the epicardial fat that is commonly seen adjacent to the normal heart. Also, the sub-tricuspid region may be difficult to distinguish from the atrioventricular sulcus, which is rich in fat. Cardiac MRI can visualize the extreme thinning and akinesis of the RV free wall. However, the normal RV free wall may only be about 3 mm thick, rendering the test less sensitive.
MRI Examples
Shown below is the MRI of a patient with ARVD. This is a long axis view of the right ventricle. Note the transmural diffuse bright signal in the RV free wall on spin echo T1 due to massive myocardial atrophy with fatty replacement.
![](/images/9/99/Arvd_MRI.jpg)
Shown below is the same image with the area of fatty deposition outlined in red: