title: Thallium scans in syndrome X.
abstract: OBJECTIVE
  To review thallium scans in patients with angina and normal coronary arteriograms.
  
  
  METHODS
  Retrospective review of data.
  
  
  METHODS
  Regional cardiac centre in Glasgow.
  
  
  METHODS
  100 patients selected from those undergoing diagnostic angiography for typical angina who had normal arteriograms (around 10%), no other cardiovascular abnormality, and available thallium scans (performed routinely before angiography).
  
  
  METHODS
  Coronary arteriography, exercise tests, and gated thallium scans at peak exercise.
  
  
  RESULTS
  The exercise test was positive in 30 and negative in 70 patients. Thallium defects were found in 98 patients, but no consistent pattern and no significant correlation existed between the extent of thallium defect and positive exercise test or exercise tolerance.
  
  
  CONCLUSIONS
  Thallium defects described in 98 of 100 patients with angina and normal coronary arteriograms suggest that microvascular angina may be commoner than is generally appreciated.
authors.affiliation: University Department of Medical Cardiology, Royal Infirmary, Glasgow.
authors.forename: A C
authors.initials: AC
authors.lastname: Tweddel
authors.forename: W
authors.initials: W
authors.lastname: Martin
authors.forename: I
authors.initials: I
authors.lastname: Hutton
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000000981:diagnostic imaging*; D002637:Chest Pain / Q000000981:diagnostic imaging*; D017023:Coronary Angiography; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D012189:Retrospective Studies; D013577:Syndrome; D013794:Thallium Radioisotopes
chemical_list: D013794:Thallium Radioisotopes