Skip to main content
. Author manuscript; available in PMC: 2012 Jun 26.
Published in final edited form as: Circ Res. 2011 May 12;109(1):71–79. doi: 10.1161/CIRCRESAHA.111.246512

Figure 5.

Figure 5

(A) Subcellular Ca2+ alternans develops in Pcell at CL of 300ms without APD alternans. The L1 component (black dots) of [Ca2+]avg alternates with small amplitude from beat to beat, while the L2 component (gray dots) is only present on every other beat. (B) At CL=200ms, AP alternans also develops. Both L1 and L2 components of [Ca2+]avg appear only every other beat. (C) At CL=170ms, the L1 component of [Ca2+]avg occurs every other beat, while the L2 component only every fourth beat. Pacing stimuli are indicated by gray vertical bars on top. Black or gray dots indicate L1 or L2 component of CaT (and associated processes), respectively. Stimulus-to-response ratios are indicated in brackets in each panel.