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hPSC-CMC respond with altered beat rate to external stimuli. (A) Beat rate of single hPSC-CMC (n = 18) in the temperature range of 32–38 °C. (B) Beat rate of hPSC-CMC after subsequent external adding of 1 µm of the drugs isoproterenol (Iso, n = 15), propranolol (Pro, n = 15), and verapamil (Vera, n = 7) to untreated controls (Ctrl, n = 15). Circles show individual measurements; red marks show the mean ± 95% CI.
