Characterization of the frequency-force relationship in the dog atrium in situ.
D000818:Animals; D016275:Atrial Function; D001783:Blood Flow Velocity; D001794:Blood Pressure; D002395:Catecholamines / Q000378:metabolism; D003331:Coronary Vessels; D004285:Dogs; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System; D006339:Heart Rate; D009206:Myocardium / Q000378:metabolism; D011312:Pressure; D011984:Sensory Receptor Cells
D002395:Catecholamines