The negative inotropic effect of vagal stimulation on the heart ventricles of the duck.
D000818:Animals; D001794:Blood Pressure; D002302:Cardiac Output; D004242:Diving; D004372:Ducks; D004594:Electrophysiology; D006329:Heart Conduction System / Q000502:physiology*; D006352:Heart Ventricles; D014630:Vagus Nerve / Q000502:physiology*