title: ECG-abnormalities in Japanese and Swedish patients with sarcoidosis. A comparison.
abstract: OBJECTIVE
  ECG abnormalities are more common in patients with sarcoidosis than in controls. The incidence of cardiac sarcoid granulomas in the Japanese population has been found to be higher than that seen in Caucasians. We compared the prevalence of ECG abnormalities in Japanese and Swedish patients with sarcoidosis.
  
  
  METHODS
  Twelve-lead routine ECG's were compared between consecutive patients (134 Japanese and 149 Swedish) of similar age with histologically verified sarcoidosis or a high clinical probability of the disease and a history of no more than 12 months before the ECG.
  
  
  RESULTS
  There was no statistically significant difference in the prevalence of first degree AV block, ST-T-segment abnormalities, right bundle branch block (RBBB) and left anterior block (LAH) in Japanese and Swedish patients. Among the Swedes, the results were compared with those of a smaller group (n = 29) of older patients with a longer disease course. In these few patients LAH and RBBB occurred more frequently than in patients with a recent diagnosis.
  
  
  CONCLUSIONS
  ECG abnormalities in patients with sarcoidosis seem to be of similar frequency in Japan and Sweden. ST-T changes and first degree AV block would appear early in the course of the disease, whereas more pronounced conduction defects may appear later.
authors.affiliation: Department of Clinical Physiology and Radiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
authors.forename: F
authors.initials: F
authors.lastname: Larsen
authors.forename: S K
authors.initials: SK
authors.lastname: Pehrsson
authors.forename: N
authors.initials: N
authors.lastname: Hammar
authors.forename: C M
authors.initials: CM
authors.lastname: Sköld
authors.forename: T
authors.initials: T
authors.lastname: Izumi
authors.forename: S
authors.initials: S
authors.lastname: Nagai
authors.forename: M
authors.initials: M
authors.lastname: Shigematsu
authors.forename: A
authors.initials: A
authors.lastname: Eklund
mesh_terms: D009202:Cardiomyopathies / Q000208:ethnology / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007564:Japan / Q000208:ethnology; D008297:Male; D008875:Middle Aged; D012507:Sarcoidosis / Q000208:ethnology / Q000503:physiopathology*; D013548:Sweden / Q000208:ethnology