title: Relation of admission QRS duration with development of angiographic no-reflow in patients with acute ST-segment elevation myocardial infarction treated with primary percutaneous interventions.
abstract: BACKGROUND
  Although QRS-complex changes during ischemia have been described previously, their relation with no-reflow is not clear.
  
  
  OBJECTIVE
  To evaluate relation of admission QRS duration with angiographic no-reflow, we studied 162 patients who underwent primary angioplasty.
  
  
  METHODS
  Twelve-lead electrocardiogram with a paper speed of 50 mm/s was recorded on admission and repeated after angioplasty. Patients were divided into reflow and no-reflow groups based on postangioplasty coronary thrombolysis in myocardial infarction flow grade.
  
  
  RESULTS
  Patients in the no-reflow group (26 patients) were older (P = .001) and had significantly longer pain-to-balloon interval (P = .007). The patients in the no-reflow group had significantly longer QRS duration on admission electrocardiogram compared with patients in the reflow group (interquartile range, 80-93 [median, 84] milliseconds vs 60-80 [median, 76] milliseconds, respectively; P < .001). After adjusting all variables, QRS duration on admission was found to be independently related to angiographic no-reflow (odds ratio, 1.07; 95% confidence interval, 1.02-1.12; P = .003).
  
  
  CONCLUSIONS
  QRS duration on admission may be valuable in predicting no-reflow.
authors: Cardiology Department, Yuksek Ihtisas Education and Research Hospital, Ankara, Turkey. drorhanmaden@yahoo.co.uk
authors: Orhan
authors: O
authors: Maden
authors: Fehmi
authors: F
authors: Kaçmaz
authors: Mehmet Timur
authors: MT
authors: Selçuk
authors: Hatice
authors: H
authors: Selçuk
authors: Omer
authors: O
authors: Alyan
authors: Tolga
authors: T
authors: Aksu
authors: Fatma
authors: F
authors: Metin
authors: Omaç
authors: O
authors: Tüfekçioğlu
authors: Ramazan
authors: R
authors: Atak
authors: Ahmet Duran
authors: AD
authors: Demir
authors: Yücel
authors: Y
authors: Balbay
authors: Erdoğan
authors: E
authors: Ilkay
mesh_terms: D015906:Angioplasty, Balloon, Coronary / Q000706:statistics & numerical data*; D017023:Coronary Angiography / Q000706:statistics & numerical data; D003324:Coronary Artery Disease / Q000175:diagnosis* / Q000453:epidemiology / Q000601:surgery*; D004562:Electrocardiography / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000453:epidemiology / Q000601:surgery*; D010343:Patient Admission / Q000706:statistics & numerical data*; D015995:Prevalence; D011379:Prognosis; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D014421:Turkey / Q000453:epidemiology