Regions of the rabbit's heart atrio-ventricular node at which impulse propagation becomes critical.
D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D004558:Electric Stimulation; D004594:Electrophysiology; D006329:Heart Conduction System / Q000502:physiology*; D000860:Hypoxia / Q000150:complications; D066298:In Vitro Techniques; D010477:Perfusion; D011817:Rabbits
D000109:Acetylcholine