title: Should we give prophylactic renal-dose dopamine after coronary artery bypass surgery?
abstract: OBJECTIVE
  A prospective double-blind randomized study undertaken to assess the effect of postoperative prophylactic "renal-dose" dopamine on post-coronary artery bypass grafting surgery's clinical outcome.
  
  
  METHODS
  Eighty-five consecutive patients undergoing CABG operation were randomized to receive either 3-5 microg/kg/min dopamine (group D, n = 41) or saline as placebo (group P, n = 45) for 48 postoperative hours. Clinical outcome parameters were collected for four postoperative days.
  
  
  RESULTS
  Preoperative and operative parameters were similar in both groups. Four patients from group P and none from group D reached an end-point of the study (oliguria, renal dysfunction) and received dopamine. Two patients from group P and none from group D needed an additional inotropic support. Mean arterial pressure values were similar during the first 24 hours after operation, but left atrial pressure values tended to be higher in group P (10 +/- 4 vs 7 +/- 3 mmH2O, p = 0.18). The mean pH was higher in group D at 8 hours after operation (7.38 +/- 0.2 vs 7.36 +/- 0.3, p = NS), due to higher bicarbonate levels (23 +/- 2 mmol/l vs 21 +/- 2, p = 0.49). The incidence of lung congestion in chest X-rays and CT scans was significantly higher in group P (50% vs 29%, p = 0.073 at 48 hours postoperatively). Room air blood O2 saturation and maximal expiratory volume tended to be higher in group D (at 72 hours after operation- 92 +/- 4 vs 90%+/- 5, p = 0.29 and 646 +/- 276 vs 485 ml +/- 206, p = 0.16, respectively). There was no statistical difference in urine output but the amount of furosemide given to patients in group P was significantly higher (during the first 8 hours 2.5 +/- 0.5 vs. 0.3 mg +/- 1.6, p = 0.07). Plasma creatinine levels were significantly lower in group D (at 24 hours 0.93 +/- 0.02 vs 1.05 mg/dL +/- 0.02, p = 0.02). Mobilization after surgery was faster in group D.
  
  
  CONCLUSIONS
  Prophylactic dopamine administration after coronary artery bypass grafting surgery improves patient hemodynamic and renal status, reduces the need for additional medical support (inotropes and furosemide) and thus, provides stable postoperative course.
authors.affiliation: Department of Cardiothoracic Surgery, Soroka Medical Center, Beer Sheva, Israel.
authors.forename: Inbar
authors.initials: I
authors.lastname: Gatot
authors.forename: Dan
authors.initials: D
authors.lastname: Abramov
authors.forename: Vadim
authors.initials: V
authors.lastname: Tsodikov
authors.forename: Michal
authors.initials: M
authors.lastname: Yeshayahu
authors.forename: Michal
authors.initials: M
authors.lastname: Yeshaaiahu
authors.forename: Solomon
authors.initials: S
authors.lastname: Orman
authors.forename: Aharon
authors.initials: A
authors.lastname: Gavriel
authors.forename: Ilia
authors.initials: I
authors.lastname: Chorni
authors.forename: David
authors.initials: D
authors.lastname: Tuvbin
authors.forename: Salis
authors.initials: S
authors.lastname: Tager
authors.forename: Azai
authors.initials: A
authors.lastname: Apelbom
mesh_terms: D000368:Aged; D001639:Bicarbonates / Q000097:blood; D015415:Biomarkers / Q000097:blood / Q000652:urine; D001794:Blood Pressure / Q000502:physiology; D002316:Cardiotonic Agents / Q000008:administration & dosage*; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000378:metabolism / Q000503:physiopathology / Q000628:therapy*; D004298:Dopamine / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D005500:Follow-Up Studies; D005541:Forced Expiratory Volume / Q000502:physiology; D006801:Humans; D007557:Israel; D007668:Kidney / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D011182:Postoperative Care; D011446:Prospective Studies; D016896:Treatment Outcome
chemical_list: D001639:Bicarbonates; D015415:Biomarkers; D002316:Cardiotonic Agents; D010100:Oxygen; D004298:Dopamine