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Figure 8 Multielectrode extracellular potential mapping during propagation of excitation. (A) Representative electrograms recorded from the 64 terminals. (Arrows) Stimulus artifacts. (B and C) Isochrone maps of activation time in a culture dish before (control) and after rapid electrical stimulation (RES) for 90 min in the absence of losartan. (D) Isochrone map of activation time in another culture dish after RES for 90 min in the presence of 100 nM losartan. ST = stimulation point; * = stimulation points.
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