title: Prevalence of manual Strauss LBBB criteria in patients diagnosed with the automated Glasgow LBBB criteria.
abstract: BACKGROUND
  About one-third of patients undergoing cardiac resynchronization therapy because of left bundle branch block (LBBB) and heart failure do not improve. Strauss et al. have developed strict criteria to more accurately define complete LBBB in this patient group. The aim of this study was to investigate the prevalence of the manual application of the Strauss criteria for LBBB (QRS ≥ 140 ms in men, ≥ 130 ms in women, along with mid-QRS notching/slurring) in consecutive patients who have been diagnosed with LBBB by the automated Glasgow criteria (QRS ≥ 120 ms).
  
  
  METHODS
  In 158 consecutive patients (78 females) diagnosed with LBBB according to the automated Glasgow criteria, the manual Strauss criteria were applied.
  
  
  CONCLUSIONS
  A majority of patients (87%) diagnosed with LBBB using the Glasgow criteria were positive for the Strauss criteria. In 70% (13/20) of the cases of disagreement the reason for disagreement was short QRS duration.
authors.affiliation: Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital and Lund University, Lund, Sweden.
authors.forename: Jakob
authors.initials: J
authors.lastname: Almer
authors.affiliation: Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, USA.
authors.forename: Robbert
authors.initials: R
authors.lastname: Zusterzeel
authors.affiliation: Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, USA.
authors.forename: David G
authors.initials: DG
authors.lastname: Strauss
authors.affiliation: Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital and Lund University, Lund, Sweden.
authors.forename: Elin
authors.initials: E
authors.lastname: Trägårdh
authors.affiliation: Department of Health Services, University of Washington, Seattle, WA, USA.
authors.forename: Charles
authors.initials: C
authors.lastname: Maynard
authors.affiliation: Duke Clinical Research Institute, Durham, NC, USA.
authors.forename: Galen S
authors.initials: GS
authors.lastname: Wagner
authors.affiliation: Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital and Lund University, Lund, Sweden. Electronic address: henrik.engblom@med.lu.se.
authors.forename: Henrik
authors.initials: H
authors.lastname: Engblom
mesh_terms: D000368:Aged; D000465:Algorithms; D002037:Bundle-Branch Block / Q000145:classification* / Q000175:diagnosis*; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D015588:Observer Variation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index
keywords: CRT; Diagnostic criteria; ECG; LBBB