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Marked Lipomatous Infiltration of the Right Ventricle: MRI Findings in Relation to Arrhythmogenic Right Ventricular Dysplasia

Robson Macedo1, Kalpana Prakasa1, Crystal Tichnell1, Frank Marcus2, Hugh Calkins1, João A. C. Lima1,3 and David A. Bluemke1,3

1 Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, MRI Bldg., Rm. 143, 600 N Wolf St., Baltimore, MD, 21287.
2 Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD.
3 Division of Cardiology, Department of Medicine, University of Arizona, Phoenix, AZ.


Figure 1
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  		Fig. 1A —30-year-old man in normal health. Axial proton density-weighted fast spin-echo MR image without fat saturation shows intermediate signal intensity of normal right ventricular wall (arrows) in relation to high signal intensity of adjacent fat.

 

Figure 2
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  		Fig. 1B —30-year-old man in normal health. Axial proton density-weighted fast spin-echo MR image with fat saturation shows normal right ventricular wall with well-defined epicardial border (arrows).

 

Figure 3
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  		Fig. 2A —45-year-old woman with history of nonsustained ventricular tachycardia. Axial proton density-weighted fast spin-echo MR image without fat saturation shows fat replacement of entire right ventricular (RV) wall (arrows), which appears thickened.

 

Figure 4
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  		Fig. 2B —45-year-old woman with history of nonsustained ventricular tachycardia. Axial proton density-weighted fast spin-echo MR image with fat saturation shows suppression of fatty component of RV wall. Thin portion of nonfatty RV wall (arrows) is evident.

 

Figure 5
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  		Fig. 3A —48-year-old woman with history of palpitations and nonsustained ventricular tachycardia. Axial T1-weighted fast spin-echo MR image without fat saturation shows fat replacement of entire right ventricular wall (arrows), which appears thickened.

 

Figure 6
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  		Fig. 3B —48-year-old woman with history of palpitations and nonsustained ventricular tachycardia. Bright blood four-chamber MR images of heart in diastole (B) and systole (C) show normal biventricular cardiac function.

 

Figure 7
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  		Fig. 3C —48-year-old woman with history of palpitations and nonsustained ventricular tachycardia. Bright blood four-chamber MR images of heart in diastole (B) and systole (C) show normal biventricular cardiac function.

 

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