Participants with abnormal left ventricular mass index (LVMI) at baseline achieved 25% mean reduction in LVMI by 12 months or sooner Clinically meaningful improvements in majority of participants across cardiac biomarkers and functional measures All SUNRISE-FA participants achieved meaningful increases in frataxin expression at 3-months post treatment; 115% average cardiac frataxin expression increase in high dose cohort, demonstrating dose response Frataxin expression and LVMI improvement exceed co-primar ...