Abstract
It was demonstrated in experiments on dogs, that the stimulation of dynamic heart nerves of sympathetic and parasympathetic origin (which evoke positive and negative inotropic effects) was associated with the change of contents of phosphorus fractions (inorganic phosphorus, adenosinetriphosphate and phosphocreatine) and, like-wise, in the change of intensity of tissue respiration. These changes depended on the duration of the stimulation. The content of glycogen in all cases never went below the control level. The mechanism of these phenomena are discussed in their connection with the physiological effects.
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