Temperature dependence of spontaneous electrical activity in early embryonic heart monitored optically with a potential-sensitive dye.

@article{Hirota1983TemperatureDO,
  title={Temperature dependence of spontaneous electrical activity in early embryonic heart monitored optically with a potential-sensitive dye.},
  author={Akihiko Hirota and Shiroh Fujii and Tetsuro Sakai and Kohtaro Kamino},
  journal={The Japanese journal of physiology},
  year={1983},
  volume={33 1},
  pages={
          85-100
        }
}
The effects of temperature on spontaneous action potential activity in the 7-9 somite embryonic precontractile chick hearts were investigated using an optical method for monitoring membrane potential. A potential-sensitive merocyanine-rhodanine dye was used as an optical probe. Cooling caused a marked decrease in the frequency of occurrence of the spontaneous action potential. This slowing was associated with a decreased rate of diastolic depolarization of the pacemaker action potential. When… CONTINUE READING

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