title: Effect of small-dose dopamine on mesenteric blood flow and renal function in a pig model of cardiopulmonary resuscitation with vasopressin.
abstract: Vasopressin (antidiuretic hormone) seems a promising alternative to epinephrine for cardiopulmonary resuscitation (CPR) in cardiac arrest victims, mediating a pronounced blood flow shift toward vital organs. We evaluated the effects of small-dose dopamine on splanchnic blood flow and renal function after successful resuscitation with this potent vasoconstrictor in an established porcine CPR model. After 4 min of cardiac arrest and 3 min of CPR, animals received 0.4 U/kg vasopressin and were continuously infused with either dopamine 4 microg x kg(-1) x min(-1) (n = 6), or saline placebo (n = 6). Defibrillation was performed 5 min after drug administration; all animals were observed for 6 h after return of spontaneous circulation. During the postresuscitation phase, average mean +/- SD superior mesenteric artery blood flow was significantly (P = 0.002) higher in the dopamine group compared with the placebo group (1185+/-130 vs 740+/-235 mL/min), whereas renal blood flow was comparable between groups (255+/-40 vs 250+/-85 mL/min). The median calculated glomerular filtration rate had higher values in the dopamine group (70-120 mL/min) than in the placebo group (40-70 mL/min; P = 0.1 at 0 min and P = 0.08 at 360 min). We conclude that small-dose dopamine administration may be useful in improving superior mesenteric artery blood flow and renal function after successful resuscitation with vasopressin.
  
  
  CONCLUSIONS
  Long-term survival after cardiac arrest may be determined by the ability to ensure adequate organ perfusion during cardiopulmonary resuscitation and in the postresuscitation phase. In this regard, small-dose dopamine improved postresuscitation blood flow to the mesenteric bed when vasopressin was used as an alternative vasopressor in an animal model of cardiac arrest.
authors.affiliation: Department of Anaesthesia and Intensive Care Medicine, Leopold-Franzens-University of Innsbruck, Austria. wolfgang.voelckel@uibk.ac.at
authors.forename: W G
authors.initials: WG
authors.lastname: Voelckel
authors.forename: K H
authors.initials: KH
authors.lastname: Lindner
authors.forename: V
authors.initials: V
authors.lastname: Wenzel
authors.forename: J O
authors.initials: JO
authors.lastname: Bonatti
authors.forename: A C
authors.initials: AC
authors.lastname: Krismer
authors.forename: E A
authors.initials: EA
authors.lastname: Miller
authors.forename: K G
authors.initials: KG
authors.lastname: Lurie
mesh_terms: D000818:Animals; D001784:Blood Gas Analysis; D016887:Cardiopulmonary Resuscitation / Q000379:methods*; D002316:Cardiotonic Agents / Q000008:administration & dosage*; D004195:Disease Models, Animal; D004298:Dopamine / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D005260:Female; D006323:Heart Arrest / Q000188:drug therapy; D007422:Intestines / Q000098:blood supply; D007668:Kidney / Q000187:drug effects* / Q000502:physiology; D008297:Male; D017538:Mesenteric Artery, Superior / Q000187:drug effects / Q000502:physiology; D012076:Renal Agents / Q000008:administration & dosage; D013152:Splanchnic Circulation / Q000187:drug effects*; D013552:Swine; D014662:Vasoconstrictor Agents / Q000008:administration & dosage*; D014667:Vasopressins / Q000008:administration & dosage*
chemical_list: D002316:Cardiotonic Agents; D012076:Renal Agents; D014662:Vasoconstrictor Agents; D014667:Vasopressins; D004298:Dopamine