title: Virtual electrode, graded responses, reentry, breakthrough, and undetermined:.
authors.forename: Shien-Fong
authors.initials: SF
authors.lastname: Lin
mesh_terms: D000200:Action Potentials; D000818:Animals; D018780:Body Surface Potential Mapping / Q000379:methods*; D004558:Electric Stimulation; D004566:Electrodes; D004699:Endocardium / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology*; D008564:Membrane Potentials; D010496:Pericardium / Q000503:physiopathology*; D012756:Sheep; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000503:physiopathology*; D014693:Ventricular Fibrillation / Q000503:physiopathology*