Fig. 1

Cardiomyocytes post-isolation. A) Brightfield image of isolated cardiomyocytes after plating. B) Confocal imaging of isolated cardiomyocytes stained with the cell membrane marker wheat germ agglutinin (WGA) (colored purple) and the nuclei marker DAPI (colored blue). C) Confocal imaging of isolated cardiomyocytes stained with the cell membrane and T-tubule marker Di-8-ANEPPS