title: Retrospective analysis of patients who developed pulmonary hypertension during the early postoperative period after liver transplantation.
abstract: BACKGROUND
  Pulmonary hypertension (PH) (mean pulmonary arterial pressure [mPAP] > 25 mm Hg) is frequently observed during the postoperative period after liver transplantation (LT).
  
  
  OBJECTIVE
  The objective was to compare respiratory function, intensive care unit (ICU) length of stay (LOS), and 30-day survival rates among patients evolving with PH with those who do versus do not develop it during the postoperative period after LT.
  
  
  METHODS
  Fifty-seven patients undergoing LT from January 1999 to December 2000 were divided into 2 groups: Group 1 (G1; n = 26), without PH; and Group 2 (G2; n = 31), with moderate PH. Preoperative parameters were Child-Pugh's classification, pulmonary function tests, mPAP, and P(A-a)O(2). During the intraoperative period, warm and cold ischemic times and the amount of blood transfusion were evaluated, whereas mPAP, PaO(2)/FiO(2) ratio, weaning time, ICU LOS, and 30-day survival rates were evaluated postoperatively.
  
  
  RESULTS
  mPAP in early postoperative period was 21 +/- 13 mm Hg and 32 +/- 4 mm Hg in G1 and G2, respectively (P <.0001). PaO(2)/FiO(2) was 310 +/- 82 mm Hg in G1 and 272 +/- 84 mm Hg in G2 (P =.48). In G1 and G2, 77% and 74% of patients, respectively, were successfully weaned in the first 24 hours postoperative (P =.10). ICU LOS was 111 hours (range, 45-1098 hours) in G1 and 102 hours (range, 59-284 hours) in G2 (P =.36). The 30-day survival rate was 20 of 26 (77%) in G1 and 26 of 31 (84%) in G2 (P =.44).
  
  
  CONCLUSIONS
  Our data suggest that moderate PH during the early postoperative phases of LT cannot be considered an additional risk factor for pulmonary dysfunction, and for an increased ICU LOS or 30-day mortality rate.
authors.affiliation: Liver Transplant Unit, General Hospital, Campinas State University, Sao Paulo, Brazil. capveloso@uol.com.br
authors.forename: C A
authors.initials: CA
authors.lastname: Veloso
authors.forename: I F S
authors.initials: IF
authors.lastname: Boin
authors.forename: D
authors.initials: D
authors.lastname: Dragosavac
authors.forename: L S
authors.initials: LS
authors.lastname: Leonardi
authors.forename: L C
authors.initials: LC
authors.lastname: Figueiredo
authors.forename: S
authors.initials: S
authors.lastname: Araújo
authors.forename: R G G
authors.initials: RG
authors.lastname: Terzi
mesh_terms: D001794:Blood Pressure; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000453:epidemiology*; D016031:Liver Transplantation / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D012189:Retrospective Studies; D013997:Time Factors