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Figure 3 The top left and right panels represent the end-diastolic and end-systolic frames of a short-axis cine magnetic resonance image (MRI) showing an area of dyskinesia on right ventricular free wall characterizing a focal ventricular aneurysm (arrows). The bottom left panel displays the delayed-enhanced MRI with increased signal intensity within the right ventricular myocardium (arrows), at the location of RV aneurysms. The bottom right panel shows the corresponding endomyocardial biopsy. Trichrome stain of the right ventricle at high magnification shows marked replacement of the ventricular muscle by adipose tissue. The adipose tissue cells (arrowhead) are irregular in size and infiltrate the ventricular muscle. There is also abundant replacement fibrosis (arrow). There is no evidence of inflammation.
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