American journal of physiology . ventricle isplaced in a solution of cane sugar equimolecular with per centsodium chloride no beats occur in the strip. But when the strip istransferred from the sugar solution to a per cent sodium chloridesolution rhythmic beats sometimes begin suddenly, so suddenly that 1 Greene: loc. cit., p. 105. 2 Howell: he. cif., p. 71. The Action of Certain lojis on Ventricular Muscle. 271 they seem as if started by an electric shock. (See Fig. 2.) Again itcan be shown that to some extent the power a solution has of start-ing rhythmic beats in heart-tissue is det
American journal of physiology . ventricle isplaced in a solution of cane sugar equimolecular with per centsodium chloride no beats occur in the strip. But when the strip istransferred from the sugar solution to a per cent sodium chloridesolution rhythmic beats sometimes begin suddenly, so suddenly that 1 Greene: loc. cit., p. 105. 2 Howell: he. cif., p. 71. The Action of Certain lojis on Ventricular Muscle. 271 they seem as if started by an electric shock. (See Fig. 2.) Again itcan be shown that to some extent the power a solution has of start-ing rhythmic beats in heart-tissue is determined by the number ofsodium ions present in it. For example, a solution consisting of49 of cane sugar -|- i of sodium chloride did not start would a strip beat in a solution of 40 sugar -|- 10 ofsodium chloride, but this strip did beat when it was transferred to asolution of 25 of sugar -|- 25 of sodium chloride same results were obtained with a solution of dextrose. We can.
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