title: Thallium perfusion defects predict subsequent cardiac dysfunction in patients with systemic sclerosis.
abstract: OBJECTIVE
  To determine the significance of thallium perfusion defects in patients with systemic sclerosis (SSc).
  
  
  METHODS
  This is a followup study of a series of 48 SSc patients who underwent thallium perfusion scans in the early 1980s. Their cardiac history and survival information over the last 10 years were obtained as part of the Pittsburgh Databank's yearly evaluation. We determined the frequency of subsequent development of arrhythmias requiring treatment or of congestive heart failure through patient and physician information.
  
  
  RESULTS
  Patients with larger thallium perfusion defects had a significantly increased risk of developing subsequent cardiac events or death. The size of the initial thallium defect was the best predictor of later adverse events compared with other disease-related features, in a logistic regression analysis.
  
  
  CONCLUSIONS
  We conclude that patients with SSc who have significant thallium perfusion defects are at a significantly increased risk of developing subsequent cardiac disease or death.
authors.affiliation: University of Pittsburgh School of Medicine, Pennsylvania 15261, USA.
authors.forename: V D
authors.initials: VD
authors.lastname: Steen
authors.forename: W P
authors.initials: WP
authors.lastname: Follansbee
authors.forename: C G
authors.initials: CG
authors.lastname: Conte
authors.forename: T A
authors.initials: TA
authors.lastname: Medsger
mesh_terms: D005260:Female; D005500:Follow-Up Studies; D006321:Heart / Q000000981:diagnostic imaging*; D006331:Heart Diseases / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011877:Radionuclide Imaging; D012307:Risk Factors; D012595:Scleroderma, Systemic / Q000150:complications*; D013793:Thallium
chemical_list: D013793:Thallium