title: A cross-sectional study of the prevalence of cardiac valvular abnormalities in hyperprolactinemic patients treated with ergot-derived dopamine agonists.
abstract: BACKGROUND
  Concern exists in the literature that the long-term use of ergot-derived dopamine agonist drugs for the treatment of hyperprolactinemia may be associated with clinically significant valvular heart disease.
  
  
  OBJECTIVE
  The aim of the study was to determine the prevalence of valvular heart abnormalities in patients taking dopamine agonists as treatment for lactotrope pituitary tumors and to explore any associations with the cumulative dose of drug used.
  
  
  METHODS
  A cross-sectional echocardiographic study was performed in a large group of patients who were receiving dopamine agonist therapy for hyperprolactinemia. Studies were performed in accordance with the British Society of Echocardiography minimum dataset for a standard adult transthoracic echocardiogram. Poisson regression was used to calculate relative risks according to quartiles of dopamine agonist cumulative dose using the lowest cumulative dose quartile as the reference group.
  
  
  METHODS
  Twenty-eight centers of secondary/tertiary endocrine care across the United Kingdom participated in the study.
  
  
  RESULTS
  Data from 747 patients (251 males; median age, 42 y; interquartile range [IQR], 34-52 y) were collected. A total of 601 patients had taken cabergoline alone; 36 had been treated with bromocriptine alone; and 110 had received both drugs at some stage. The median cumulative dose for cabergoline was 152 mg (IQR, 50-348 mg), and for bromocriptine it was 7815 mg (IQR, 1764-20 477 mg). A total of 28 cases of moderate valvular stenosis or regurgitation were observed in 24 (3.2%) patients. No associations were observed between cumulative doses of dopamine agonist used and the age-corrected prevalence of any valvular abnormality.
  
  
  CONCLUSIONS
  This large UK cross-sectional study does not support a clinically concerning association between the use of dopamine agonists for the treatment of hyperprolactinemia and cardiac valvulopathy.
authors.affiliation: St Bartholomew's Hospital (W.M.D., C.E.S.), London EC1A 7BE, United Kingdom; Leicester Royal Infirmary (T.A.H.), Leicester LE1 5WW, United Kingdom; Queen Elizabeth Hospital (A.A.T., R.P.S.), Birmingham B15 2WB, United Kingdom; and Aberdeen Royal Infirmary (J.S.B.), Aberdeen AB25 2ZP, United Kingdom.
authors.forename: W M
authors.initials: WM
authors.lastname: Drake
authors.forename: C E
authors.initials: CE
authors.lastname: Stiles
authors.forename: T A
authors.initials: TA
authors.lastname: Howlett
authors.forename: A A
authors.initials: AA
authors.lastname: Toogood
authors.forename: J S
authors.initials: JS
authors.lastname: Bevan
authors.forename: R P
authors.initials: RP
authors.lastname: Steeds
mesh_terms: D000328:Adult; D000077465:Cabergoline; D003430:Cross-Sectional Studies; D018491:Dopamine Agonists / Q000627:therapeutic use*; D004452:Echocardiography; D004873:Ergolines / Q000627:therapeutic use; D004876:Ergot Alkaloids / Q000627:therapeutic use*; D005260:Female; D006349:Heart Valve Diseases / Q000139:chemically induced / Q000000981:diagnostic imaging / Q000453:epidemiology*; D006801:Humans; D006966:Hyperprolactinemia / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D006113:United Kingdom / Q000453:epidemiology
chemical_list: D018491:Dopamine Agonists; D004873:Ergolines; D004876:Ergot Alkaloids; D000077465:Cabergoline