title: Detection of proximal coronary occlusion in acute coronary syndrome: a feasibility study using computerized electrocardiographic analysis.
abstract: BACKGROUND
  Rapid identification of a proximal occlusion site of a major coronary artery is of paramount importance in the care of myocardial infarction (MI). It is increasingly recognized that routine electrocardiogram (ECG) can be used for that purpose, provided that expert interpretation is available. Computer-based signal analysis has potential to enhance early ECG interpretation but its performance must be validated against manual algorithms. We therefore set out to develop a computer-assisted model to detect proximal occlusion of the left anterior descending coronary artery (LAD) in patients with suspected acute coronary syndrome (ACS).
  
  
  METHODS
  Based on manual anatomical interpretation of the ECG, obtained from 216 consecutive patients who were admitted due to suspected ACS, an automatic computerized ECG model to detect LAD occlusion was constructed. Agreement between manual evaluation of the ECG by two cardiologists and a computerized ECG algorithm to detect occlusion of the LAD and the site of occlusion was determined.
  
  
  RESULTS
  Using an expert electrocardiographer's anatomical interpretation as the gold standard, the computer model recognized patients fulfilling ECG criteria for any occlusion of the LAD with a specificity of 99% and a sensitivity of 67% (kappa= 0.71). However, proximal LAD occlusion was detected with 100% specificity and 86% sensitivity (kappa= 0.72). The computer program detected a distal occlusion in the LAD with a specificity of 99% and a sensitivity of 40% (kappa= 0.72).
  
  
  CONCLUSIONS
  Computerized anatomical interpretation of the ECG is feasible and allows detection of a proximal LAD occlusion with excellent accuracy.
authors.affiliation: Heart Center, Tampere University Hospital, Tampere, Finland. markku.eskola@pshp.fi
authors.forename: Markku J
authors.initials: MJ
authors.lastname: Eskola
authors.forename: Kjell C
authors.initials: KC
authors.lastname: Nikus
authors.forename: Liisa-Maria
authors.initials: LM
authors.lastname: Voipio-Pulkki
authors.forename: Heini
authors.initials: H
authors.lastname: Huhtala
authors.forename: Juha
authors.initials: J
authors.lastname: Lund
authors.forename: Tuomo
authors.initials: T
authors.lastname: Ilva
authors.forename: Kari O
authors.initials: KO
authors.lastname: Niemelä
authors.forename: Pekka
authors.initials: P
authors.lastname: Porela
mesh_terms: D054058:Acute Coronary Syndrome / Q000175:diagnosis* / Q000503:physiopathology; D000465:Algorithms; D023921:Coronary Stenosis / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted