we report the pathologic changes in the heart of a 27-year-old woman with friedreich 's ataxia , including ventricular subendocardial fibroelastosis , occlusion of the coronary sinus ostium , individual myofiber loss , myofiber disarray , and markedly enlarged , hyperchromatic myofiber nuclei .
C0018787
heart
C0018827
ventricular