Respiratory variation of heart rate in the California sea lion.
D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001831:Body Temperature; D010872:Caniformia; D004562:Electrocardiography; D004567:Electrodes, Implanted; D006339:Heart Rate / Q000187:drug effects; D012123:Pulmonary Ventilation; D012119:Respiration; D013997:Time Factors; D014630:Vagus Nerve / Q000502:physiology
D001285:Atropine