Figure 2: Measurement of Action Potentials and Calcium Transients with Different Densities of Cardiomyocytes Cultures. Action potential recordings from cardiomyocytes seeded at (A) 10K cells/well, (B) 20K cells/well, (C) 30K cells/well, and (D) 40K cells/well. Calcium transient recordings from cardiomyocytes seeded at (E) 10K cells/well, (F) 20K cells/well, (G) 30K cells/well, and (H) 40K cells/well.