Fig. 2

Isoprenaline response of the control and long QT syndrome (LQT) type 1 and 2-specific cardiomyocyte clusters (hESC, WTa, WTb, LQT1A, LQT1B and LQT2). Data is presented mean ± SD. Mean beating rates (BR) were normalized to baseline BR. Asterisks mark the statistical significance for mean BR increase compared to baseline values. *p < 0.05, **p < 0.01, ***p < 0.001