Figure 3

Influence of CL variation on APD dispersion in LQT2. (A) Activation map and sample trace of action potentials. (B) Corresponding mean CLs (black) and ΔAPDmax-min (red) in panel (A,C) APD maps. The beat with the maximum APD dispersion is marked with a red square (10th beat). Note that short-long alternating CL precedes the maximum APD dispersion.