title: Evaluation of the electrocardiogram in identifying and quantifying lateral involvement in nonanterior wall infarction using cardiovascular magnetic resonance imaging.
abstract: OBJECTIVE
  The objective of this study was to assess the involvement and extent of lateral wall myocardial infarction (MI) in patients with a first nonanterior wall MI, as reflected by changes in precordial leads. Delayed enhancement cardiac magnetic resonance imaging was used as a gold standard to localize and quantify myocardial scar tissue.
  
  
  METHODS
  Electrocardiogram and cardiac magnetic resonance were studied in 56 patients. Areas involved were related to QRS changes in precordial leads.
  
  
  RESULTS
  Significant correlations were found between lateral wall involvement and R waves in V(1) and V(6) (P = 0.009-0.022). For patients with circumflex branch occlusions, the MI size of the apical and lateral segments correlated strongly with the characteristics of R waves in V(1) and V(2) (P = 0.001-0.034).
  
  
  CONCLUSIONS
  Tall and broad R waves in V(1) reflect lateral wall MI, especially in circumflex occlusions.
authors.affiliation: Maastricht University, AZ Maastricht, The Netherlands. kirian.vander.weg@mumc.nl
authors.forename: Kirian
authors.initials: K
authors.lastname: van der Weg
authors.forename: Sebastiaan C A M
authors.initials: SC
authors.lastname: Bekkers
authors.forename: Bjorn
authors.initials: B
authors.lastname: Winkens
authors.forename: Miguel E
authors.initials: ME
authors.lastname: Lemmert
authors.forename: Simon
authors.initials: S
authors.lastname: Schalla
authors.forename: Harry J G M
authors.initials: HJ
authors.lastname: Crijns
authors.forename: Johannes
authors.initials: J
authors.lastname: Waltenberger
authors.forename: Anton P M
authors.initials: AP
authors.lastname: Gorgels
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015897:Comorbidity; D003287:Contrast Media; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D016014:Linear Models; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000503:physiopathology*
chemical_list: D003287:Contrast Media