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. 2010 Dec 23;6(12):e1001041. doi: 10.1371/journal.pcbi.1001041

Figure 7. Atrial cells interspersed through the sinaoatrial node have little effect on SAN properties.

Figure 7

A) Simulated APs in the presence (dotted line) and in the absence (solid line) of atrial cells. B) The matrix showing spatial organization of atrial cells in the SAN, where “1” denotes atrial cell (blue) and “0” sinoatrial nodal cell. The SAN center contains 22% atrial cells, which gradually increases to 63% in the periphery [10]. C) A space-time plot showing initiation of action potentials in the SAN center and propagation to the atrium in a mosaic model representation.