title: Paroxysmal atrioventricular block: are phase 3 and phase 4 block mechanisms or misnomers?
authors.affiliation: New York Harbor Veterans Administration Healthcare System, Brooklyn, NY 11209, USA. nelsherif@aol.com
authors.forename: Nabil
authors.initials: N
authors.lastname: El-Sherif
authors.forename: José
authors.initials: J
authors.lastname: Jalife
mesh_terms: D000368:Aged; D054537:Atrioventricular Block / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D013610:Tachycardia / Q000503:physiopathology