[Paradoxical vagal effects on the cardiac rhythm in cats].
In anaesthetised cats, an increase in the vagal burst rate resulted in a paradoxical decrease of vagal bradycardia. This seems to be due to a shift of the vagal stimulus position towards early phase of cardiac cycle. The mechanism of this paradoxical effect depends on the magnitude of vagal chronotropic effect upon the time of vagal stimulus delivery within cardiac cycle.
Osadchiĭ
O E
OE
Kuban Medical Academy, 350640 Krasnodar, 4 Sedin St., Russia.
Pokrovskiĭ
V M
VM
D000818:Animals; D002415:Cats; D004558:Electric Stimulation; D004562:Electrocardiography; D006339:Heart Rate / Q000502:physiology*; D014630:Vagus Nerve / Q000502:physiology*