Intercyclic variation of epicardial electrograms in the dog.
D000818:Animals; D003202:Computers, Analog; D004285:Dogs; D004558:Electric Stimulation; D004566:Electrodes; D004594:Electrophysiology; D004947:Esophagus / Q000033:anatomy & histology / Q000502:physiology*; D008722:Methods; D012119:Respiration; D013997:Time Factors