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Synchronization of triggered waves due to bidirectional feedback with APD. (A–C) Black squares denote the peak of the Ca transient on a cable of 50 cells at beats 20, 40, and 60. (D) APD at cell 10 as a function of beat number is shown. (E) APD on two alternate beats as a function of cell number on a cable of 400 cells is shown. Traces show APD at beat 40 and 41, and bottom traces shows beat 100 and 101. To see this figure in color, go online.
