title: Mechanisms of ventricular arrhythmias--reentry or altered automaticity.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D004285:Dogs; D004558:Electric Stimulation; D006801:Humans; D011690:Purkinje Fibers / Q000503:physiopathology; D013610:Tachycardia / Q000503:physiopathology