title: A modification to the Valsalva manoeuvre improves its effectiveness in treating supraventricular tachycardia.
authors.forename: Leszek
authors.initials: L
authors.lastname: Pstras
mesh_terms: D006801:Humans; D013617:Tachycardia, Supraventricular; D014636:Valsalva Maneuver