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. 2009 Jan 19;587(Pt 6):1283–1292. doi: 10.1113/jphysiol.2008.164368

Figure 5. Inhibition of L-type Ca2+ current with Cd2+ (200 μm) allows the appearance of systolic [Ca2+] alternans.

Figure 5

Linescan data from a voltage clamped cell being stimulated to contract by a depolarising pulse of 36 mV from a holding potential of −40 mV, 4 consecutive stimuli are shown before and after inhibition of L-type Ca2+ current with Cd2+. The traces below show the mean fluorescence of a 20 pixel wide box at the level of the arrow expressed as F/Fo.