title: The response of the canine heart to double pulses of short duration: a simple addition principle.
mesh_terms: D000818:Animals; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D004566:Electrodes; D006321:Heart / Q000502:physiology*; D006352:Heart Ventricles / Q000503:physiopathology; D016276:Ventricular Function