Effect of serotonin on impulse activity of bulbar cardiovascular neurons.

Alteration of impulse activity of afferent and intercalatory neurons of bulbar cardiovascular center upon serotonin microinjection was demonstrated in acute experiments in rabbit. Afferent neurons were more sensitive to serotonin than interneurons.

Fine electrophysiological analysis of impulse activity of various neuron types in nodose ganglion during intraatrial injection of dalargin.

Experiments on narcotized cats showed that intraatrial injection of dalargin in doses crossing and not crossing the blood-brain barrier modifies impulse activity of nodose ganglion neurons.

Effect of thyrotropin-releasing hormone on activity of bulbar cardiovascular neurons.

Acute experiments on narcotized cats showed that intravenous injection of thyrotropin-releasing hormone (20 microg/kg) inhibited discharge activity of most afferent neurons and interneurons in the bulbar cardiovascular center.

Role of the autonomic nervous system in the development of cardiac arrhythmias in cats with acute myocardial ischemia receiving thyroliberin.

The role of the autonomic nervous system in the development of ischemic cardiac arrhythmias was studied in acute experiments on cats receiving thyrotropin-releasing hormone. Bilateral vagotomy attenuated, while bilateral transection of cardiac branches of the stellate ganglia completely abolished the antiarrhythmic effect of thyrotropin-releasing hormone.

Effect of thyrotropin-releasing hormone on the development of cardiac arrhythmias during stimulation of sensorimotor cortex in cats.

Preliminary intravenous injection of thyrotropin-releasing hormone in a dose of 20 g/kg to cats with developing myocardial ischemia during stimulation of the cerebrocortical sensorimotor zone had a pronounced antiarrhythmic effect.