Figure 11.

(A) Diastolic depolarization phase for the same cell pair used for Figs. 2–9 either when the two cells were uncoupled or when the cells were coupled by 10 nS. The diastolic intervals (DDT) are from the slower cell of the cell pair when uncoupled (DDT_s), the faster cell of the cell pair when uncoupled (DDT_f), and the simultaneously recorded diastolic intervals of the two cells when coupled (DDT_c). (B) Observed values of DDT_c versus the values predicted from the uncoupled values of DDT_s and DDT_f using Eq. 3. The solid symbols show results for the five cell pairs studied, while the open symbols show results obtained from a simulation of two pacing cells under the same conditions (see text).