Summary
The force of contraction of the isolated left auricle of the rat could not be correlated to the duration of the intracellular action potential, if stimuli were spaced at intervals of 30 sec or more. With these long intervals, acetylcholine had no inotropic effect but still shortened the action potential.
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References
F. Baumann, L. Girardier etJ. Posternak, Helv. physiol. Acta18, 509 (1960).
E. M. Vaughan Williams, J. Physiol.147, 325 (1959).
E. M. Vaughan Williams, J. Physiol.149, 78 (1959).
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Baumann, F. Effets de l'acétylcholine et de la fréquence de stimulation sur le potentiel d'action et sur la contraction de l'oreillette gauche du rat. Experientia 18, 30 (1962). https://doi.org/10.1007/BF02136642
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DOI: https://doi.org/10.1007/BF02136642