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[Mechanisms of the development of cardiogenic vagosympathetic reflexes].

Mechanisms of development of cardiogenic vagosympathetic depressor reflexes during adrenergic heart stimulation and local immune and ischemic damages of the left ventricle were studied in anesthetized dogs and cats by recording afferent and efferent impulsation from cardiac nerves as well as cardiodynamic indices. Impulse activity in cardiac nerves showed reciprocal changes: an increase in frequency of afferent impulsation in vagal nerves and inhibition of efferent impulsation in sympathetic nerves. The data obtained suggest that stimulation of heart mechanoreceptors due to the increase of myocardial contractility and asynergy of the left ventricle, is a triggering mechanism for reflex inhibition of sympathetic impulsation and depressor reflex.