title: A review of postural orthostatic tachycardia syndrome.
abstract: A 21-year-old female reports an 18-month history of light-headedness on standing. This is often associated with palpitations and a feeling of intense anxiety. She has had two black-outs in the past 12 months. She is not taking any regular medications. Her supine blood pressure was 126/84 mmHg with a heart rate of 76 bpm, and her upright blood pressure was 122/80 mmHg with a heart rate of 114 bpm. A full system examination was otherwise normal. She had a 12-lead electrocardiogram performed which was unremarkable. She was referred for head-up tilt testing. She was symptomatic during the test and lost consciousness at 16 min. Figure 1 summarizes her blood pressure and heart rate response to tilting. A diagnosis of postural orthostatic tachycardia syndrome with overlapping vasovagal syncope was made.
authors.affiliation: Blood Pressure Unit, Mid Western Regional Hospital, Limerick, Ireland.
authors.forename: Sheila
authors.initials: S
authors.lastname: Carew
authors.forename: Margaret O
authors.initials: MO
authors.lastname: Connor
authors.forename: John
authors.initials: J
authors.lastname: Cooke
authors.forename: Richard
authors.initials: R
authors.lastname: Conway
authors.forename: Christine
authors.initials: C
authors.lastname: Sheehy
authors.forename: Aine
authors.initials: A
authors.lastname: Costelloe
authors.forename: Declan
authors.initials: D
authors.lastname: Lyons
mesh_terms: D005260:Female; D006801:Humans; D054971:Orthostatic Intolerance / Q000175:diagnosis* / Q000628:therapy*; D054972:Postural Orthostatic Tachycardia Syndrome / Q000175:diagnosis* / Q000628:therapy*; D018667:Tilt-Table Test / Q000379:methods*; D055815:Young Adult