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Clinical and prognostic significance of lung thallium uptake on rest imaging in acute myocardial infarction

Journal Article · · American Journal of Cardiology; (USA)
; ;  [1]
  1. Northwick Park Hospital, Harrow, Middlesex (England)
Exercise-induced pulmonary uptake of thallium-201 in patients with ischemic heart disease is probably due to transient pulmonary edema and left ventricular failure induced by exercise. The significance of increased lung uptake of thallium-201 at rest after acute myocardial infarction (AMI) has not been described. Ninety-six patients admitted with chest pain for suspected AMI or unstable angina underwent thallium-201 imaging at rest. Using conventional diagnostic criteria, 62 had AMI, 12 had unstable angina and 22 had neither. Increased lung uptake of thallium-201 was present in 24 of the total 96 (25%) patients, 20 of the 62 (32%) patients with AMI and 4 of 34 (13%) patients with no evidence of infarction. In the AMI group, those with increased lung thallium-201 uptake had a higher mean +/- standard deviation segmental thallium-201 defect score (22 +/- 7 vs 12 +/- 8, p less than 0.0001), lower ejection fraction (35 +/- 14 vs 49 +/- 14%, p less than 0.002), higher peak creatine kinase levels (2,410 +/- 1,247 vs 1,496 +/- 1,228 IU/liter, p less than 0.01), higher wall motion abnormality score (25 +/- 13 vs 13 +/- 12, p less than 0.0001), increased incidence of clinical in-hospital heart failure (15 of 20 vs 7 of 42, p less than 0.0001) and higher short-term mortality (4 of 20 vs 1 of 42, p less than 0.02) compared to those without increased lung thallium-201 uptake.
OSTI ID:
7244503
Journal Information:
American Journal of Cardiology; (USA), Journal Name: American Journal of Cardiology; (USA) Vol. 65:3; ISSN 0002-9149; ISSN AJCDA
Country of Publication:
United States
Language:
English