title: Postoperative chest radiographic changes after on- and off-pump coronary surgery.
abstract: OBJECTIVE
  A variety of chest radiograph abnormalities are recognized after coronary artery bypass grafting (CABG). This study analyzes the appearance of preoperative and postoperative chest radiographs in two groups of patients undergoing myocardial revascularization with or without the use of cardiopulmonary bypass (CPB).
  
  
  METHODS
  Chest radiographs (preoperative and at 1 day, 6 days and 6 to 8 weeks post operatively) were analyzed according to a detailed protocol in cases of conventional CABG on CPB (n=60) or off-pump coronary artery bypass (OPCAB) (n=60) surgery. On each film 17 different major potential postoperative abnormalities were analyzed.
  
  
  RESULTS
  Clinical findings were similar in the two groups. Patients undergoing OPCAB surgery had decreased blood loss, decreased red cell and platelet transfusion, significantly lower intubation time and required less postoperative inotropic support compared with patients undergoing CPB. The CPB group had a significantly higher incidence of left band atelectasis than the OPCAB group (37.6% vs 17.5%, p=0.01) at 6 days postoperatively. There was no other statistically significant difference in any of the 16 remaining major chest radiograph findings between the two groups.
  
  
  CONCLUSIONS
  Although OPCAB surgery is associated with improved clinical outcome compared with conventional CABG surgery, the analysis of postoperative chest radiographs demonstrated only a minor benefit as shown by a reduced degree of left band atelectasis in the OPCAB group.
authors.affiliation: Bristol Heart Institute, Bristol Royal Infirmary, Bristol, UK.
authors.forename: P
authors.initials: P
authors.lastname: Narayan
authors.forename: M
authors.initials: M
authors.lastname: Caputo
authors.forename: J
authors.initials: J
authors.lastname: Jones
authors.forename: S
authors.initials: S
authors.lastname: Al-Tai
authors.forename: G D
authors.initials: GD
authors.lastname: Angelini
authors.forename: P
authors.initials: P
authors.lastname: Wilde
mesh_terms: D000368:Aged; D016063:Blood Loss, Surgical; D001803:Blood Transfusion; D016009:Chi-Square Distribution; D001026:Coronary Artery Bypass; D047549:Coronary Artery Bypass, Off-Pump; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000601:surgery*; D003422:Critical Care; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D001261:Pulmonary Atelectasis / Q000000981:diagnostic imaging; D011859:Radiography