title: Isoproterenol-provoked versus nitroglycerin-provoked tilt tests: do they differ?
authors.forename: H
authors.initials: H
authors.lastname: Calkins
mesh_terms: D006801:Humans; D007545:Isoproterenol; D005996:Nitroglycerin; D013575:Syncope / Q000175:diagnosis*; D018667:Tilt-Table Test
chemical_list: D005996:Nitroglycerin; D007545:Isoproterenol