Figure 7

Rate dependence of action potentials in a cell cluster (cluster 26).
(A) Action potentials recorded from two different locations in the cluster having long (left, red traces) and short (right, blue traces) APs, at 90, 120, 150 and 180 bpm pacing. (B) Rate dependence of APD80 at the two recording sites. (C) Rate-dependence of fractional repolarization at the two recording sites.