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Ca2+ handling is not responsible for preferential EAD formation from RV cells. A & B) Simultaneous recordings of Vm, Ca2+ transients (CaCyto), and SR Ca2+ contents (CaSR) from single RV and LV cells. Note that higher Ca2+ level during action potential plateau in LV did not trigger EADs. C) Amplitudes of Ca2+ transients. D) Ca2+ leak from RyR. E) Ca2+ uptake. Ca2+ handling was not markedly different between RV and LV cells.
