Fig. 7From: Optical mapping study of blebbistatin-induced chaotic electrical activities in isolated rat atrium preparationsPacemaker shift during an event of BIS. Two maps of excitation spread obtained in the same event of BIS with an interval of about 2 min are shown. The data were obtained 1.5 h after the application of Bleb (50 μM). Between the two maps, the sites of the anomalous pacemakers are different. Other symbols are as defined in Figs. 1, 3, 4 and 6 Back to article page