title: Effect of Valsalva maneuver on surface electrocardiographic P-wave dispersion in paroxysmal atrial fibrillation.
abstract: The purpose of this study was to investigate the effect of the Valsalva maneuver on P-wave durations and dispersion. After the Valsalva maneuver, we found that maximum P-wave duration increased, minimum P-wave duration decreased, and P-wave dispersion increased in controls, whereas the opposite was true for unselected patients with paroxysmal AF. It was concluded that patients with paroxysmal AF performing the Valsalva maneuver normalized their P-wave dispersion, thereby correcting the inhomogeneous intra-atrial conduction.
authors.affiliation: Cardiovascular Research Center, Istanbul Faculty of Medicine, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Tükek
authors.forename: V
authors.initials: V
authors.lastname: Akkaya
authors.forename: S
authors.initials: S
authors.lastname: Demirel
authors.forename: A B
authors.initials: AB
authors.lastname: Sözen
authors.forename: H
authors.initials: H
authors.lastname: Kudat
authors.forename: D
authors.initials: D
authors.lastname: Atilgan
authors.forename: M
authors.initials: M
authors.lastname: Ozcan
authors.forename: O
authors.initials: O
authors.lastname: Güven
authors.forename: F
authors.initials: F
authors.lastname: Korkut
mesh_terms: D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001281:Atrial Fibrillation / Q000188:drug therapy / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008012:Lidocaine / Q000031:analogs & derivatives / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D013564:Sympathetic Nervous System / Q000187:drug effects / Q000503:physiopathology; D013614:Tachycardia, Paroxysmal / Q000188:drug therapy / Q000503:physiopathology*; D014636:Valsalva Maneuver
chemical_list: D000889:Anti-Arrhythmia Agents; D008012:Lidocaine; C042288:pilsicainide