title: Correlation between right atrial venous blood gasometry and cardiac index in cardiac surgery postoperative period.
abstract: OBJECTIVE
  To determine, even during postoperative period, the confiability of the cardiac index correlate with the data data given by a central atrial venous blood gasometry in patients who underwent cardiac surgery.
  
  
  METHODS
  From the sample of arterial and venous blood of right atrium gathered in postoperative of cardiac surgery, it was determinated the hemoglobin concentration and the gasometric study through what was observed of the venous oxygen saturation (SvO2) and the partial pressure of oxygen from venous blood gathered in right atrium (PvO2), add to the calculation of artery-venous difference of the oxygen content--radial artery / right atrium (C( a-v )O2). Afterwards, these parameters were compared with the cardiac index determined by thermodilution.
  
  
  RESULTS
  There was good correlation between SvO2, C(av)O2 of the venous right atrial blood and cardiac index measured by thermodilution method, with sensibility and specificity good and high positive predict value and negative predict value. The PvO2 demonstrated poor sensibility in the estimative of low output.
  
  
  CONCLUSIONS
  In cardiac surgery postoperative, the SvO2 and the C(a-v)O2 were safe parameters correlated with low cardiac output. The PvO2 demonstrated poor sensibility in the estimative of low output in postoperative cardiac surgery.
authors.affiliation: Cardiovascular Surgery Service, Hospital Regional de Mato Grosso do Sul, Cardiovascular Surgery Service, University Hospital, Federal University of Mato Groso do Sul, Campo Grande, MS, Brasil.
authors.forename: João Jackson
authors.initials: JJ
authors.lastname: Duarte
authors.forename: José Carlos Dorsa Vieira
authors.initials: JC
authors.lastname: Pontes
authors.forename: Otoni Moreira
authors.initials: OM
authors.lastname: Gomes
authors.forename: Guilherme Viotto Rodrigues da
authors.initials: GV
authors.lastname: Silva
authors.forename: Neimar
authors.initials: N
authors.lastname: Gardenal
authors.forename: Arino Faria da
authors.initials: AF
authors.lastname: Silva
authors.forename: Marcos Douglas Zamboni
authors.initials: MD
authors.lastname: Viola
mesh_terms: D000328:Adult; D000368:Aged; D001784:Blood Gas Analysis; D002302:Cardiac Output; D002303:Cardiac Output, Low / Q000097:blood; D006348:Cardiac Surgical Procedures; D002407:Catheterization, Swan-Ganz / Q000379:methods; D004812:Epidemiologic Methods; D005260:Female; D006325:Heart Atria; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood*; D010313:Partial Pressure; D011184:Postoperative Period; D017534:Radial Artery; D013815:Thermodilution / Q000379:methods
chemical_list: D010100:Oxygen