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ΔΨ oscillations occur in Ca2+-depleted conditions. ΔΨ oscillations in two randomly selected mitochondrial clusters in a cardiomyocyte in the reperfused region of a monolayer after 1 h ischemia in Ca2+-free Tyrode’s solution in the presence of EGTA and ionomycin. The monolayer was preincubated with EGTA, thapsigargin, and caffeine. ΔΨ oscillations occurred in almost all the cardiac myocytes in the field of view in two separate experiments.
