title: [Evaluation of QRS voltage in 12 derivations and Cornell criteria in the diagnosis of left ventricular hypertrophy].
abstract: OBJECTIVE
  To search for the existence and degree of correlation between total 12 lead ECG amplitude and the sum of RaVL + SV3 > 28 mm (for men) or > 20mm (for women) and left ventricular hypertrophy (LV mass calculated by echocardiography > 215g for both sexes).
  
  
  METHODS
  ECG and echocardiograms of 227 consecutive patients were examined and submitted to statistical analysis searching for correlation between total 12 lead ECG amplitude and Cornell criteria and LV mass (ASE formula modified by Devereux).
  
  
  RESULTS
  Patients had ischemic heart disease, hypertension, valvular disease, cardiomyopathy or other less common heart diseases, or had no cardiac illness at all. There was statistically significant association of total 12 lead amplitude > 120mm and Cornell criteria with LV mass > 215g (p = 0.02 and p = 0.01 respectively). Total ECG amplitude showed 74.3% sensitivity, 42.6% specificity, and 52.4% accuracy. Cornell criteria showed values of 37.8%, 82.7% and 68.7% respectively.
  
  
  CONCLUSIONS
  Total 12-lead amplitude presented limited diagnostic performance for detecting LV hypertrophy, as well as did ECG Cornell criteria, although the latter was more specific and more accurate.
authors.affiliation: Hospital São Lucas e Faculdade de Medicina da PUC/RS, Porto Alegre.
authors.forename: N R
authors.initials: NR
authors.lastname: Koehler
authors.forename: F J
authors.initials: FJ
authors.lastname: Velho
authors.forename: L C
authors.initials: LC
authors.lastname: Bodanese
authors.forename: I
authors.initials: I
authors.lastname: Collar
authors.forename: E B
authors.initials: EB
authors.lastname: Szeckyr
authors.forename: R
authors.initials: R
authors.lastname: Ferrari
authors.forename: M
authors.initials: M
authors.lastname: Rabin
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D004562:Electrocardiography; D005260:Female; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000175:diagnosis* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012737:Sex Factors
vernacular_title: Estudo da voltagem do QRS em 12 derivações e do critério Cornell na detecção de hipertrofia ventricular esquerda.