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. 1998 Jan 1;111(1):95–112. doi: 10.1085/jgp.111.1.95

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(A) Common interbeat interval (IBI) at a coupling conductance of 10 nS plotted (as a percentage of the IBI of the intrinsically faster beating cell, IBI_f) versus the IBI of the slower beating cell of the cell pair (also as a percentage of the IBI_f). Experimental results for the five cell pairs studied (•) and results obtained from a simulation of two pacing cells under the same conditions (○; see text). (B) Critical coupling conductance plotted versus the IBI of the slower beating cell of the cell pair (as a percentage of the IBI_f). Ranges experimentally obtained for three cell pairs (solid symbols and lines) and results obtained from a simulation of two pacing cells under the same conditions (○; see text). Note the difference in abscissa scales between A and B.