title: Cardiac stimulator for the study of refractory period control using current pulses of programmable duration and shape.
authors.forename: P E
authors.initials: PE
authors.lastname: Donaldson
mesh_terms: D002304:Cardiac Pacing, Artificial; D004594:Electrophysiology; D006801:Humans; D012032:Refractory Period, Electrophysiological / Q000502:physiology*