title: [Symptomless myocardial ischemia: feasibility of diagnostic mistakes].
abstract: OBJECTIVE
  To examine feasibility of ST segment depression on ECG in treadmill exercise test and 24-h ECG monitoring in subjects with coronarographically intact coronary arteries.
  
  
  METHODS
  9 males aged 41 to 52 years with chest pains unrelated to muscular load. They had neither stenosis of coronary arteries, nor arterial hypertension, valvular defects, disturbance of electrolyte metabolism. All of them have undergone treadmill exercise test and 24-h ECG monitoring.
  
  
  RESULTS
  The exercise test provoked chest pain in none of the examinees. ST segment was depressed in one patient. 24-h monitoring registered depression of ST segment in one more patient. The rest 7 patients showed no changes in ST segment either in exercise test or 24-h ECG monitoring.
  
  
  CONCLUSIONS
  It is confirmed that typical ischemic ECG changes (horizontal depression of ST segment) in healthy persons can occur and may be mistaken for silent myocardial ischemia.
authors.forename: S Iu
authors.initials: SIu
authors.lastname: Martsevich
authors.forename: A V
authors.initials: AV
authors.lastname: Zagrebel'nyĭ
authors.forename: N P
authors.initials: NP
authors.lastname: Kutishenko
authors.forename: V P
authors.initials: VP
authors.lastname: Mazaev
mesh_terms: D000328:Adult; D002637:Chest Pain / Q000175:diagnosis; D017023:Coronary Angiography; D003951:Diagnostic Errors; D015716:Electrocardiography, Ambulatory; D005080:Exercise Test; D005240:Feasibility Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000175:diagnosis*