title: The concepts of reentrant activity responsible for ectopic rhythms.
mesh_terms: D000818:Animals; D001282:Atrial Flutter / Q000503:physiopathology; D001810:Blood Volume; D001919:Bradycardia / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D002648:Child; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D006329:Heart Conduction System / Q000187:drug effects / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D011802:Quinidine / Q000494:pharmacology; D011817:Rabbits; D013268:Stimulation, Chemical; D013564:Sympathetic Nervous System / Q000503:physiopathology; D013610:Tachycardia / Q000503:physiopathology; D014630:Vagus Nerve / Q000503:physiopathology
chemical_list: D011802:Quinidine