title: Gene polymorphism and requirement for vasopressor infusion after cardiac surgery.
abstract: BACKGROUND
  Genes in the class III region of the MHC, encoding proteins involved in inflammation and vascular regulation, were investigated for association with the occurrence of vasodilation and requirement for vasopressor infusion.
  
  
  METHODS
  A cohort of 236 elective cardiac surgical patients was studied. Hemodynamic and metabolic variables and dosage of vasopressor medications were recorded for the first 12 hours of intensive care unit admission after cardiac surgery on an electronic patient record. Demographic factors and operative details were recorded from other institutional databases. The DNA was extracted from peripheral blood mononuclear cells and genotyped for the presence of polymorphic alleles in genes coding for inflammation-related proteins.
  
  
  RESULTS
  Carriage of the dimethylarginine dimethylaminohydrolase II (DDAH II) -449 G allele and the lymphotoxin alpha +252 G allele was significantly less frequent in patients who required infusions of vasopressors after cardiac surgery. On multivariate analysis, prior myocardial infarction, prolonged bypass, and the homozygous carriage of the DDAH II C allele were associated with postoperative vasopressor requirement.
  
  
  CONCLUSIONS
  Vasopressor requirement after surgery may be related to an interaction of genotype, preoperative morbidity, and prolonged surgery.
authors.affiliation: Department of Cardiothoracic Surgery, St. James's Hospital, Dublin, Ireland.
authors.forename: Ronan
authors.initials: R
authors.lastname: Ryan
authors.forename: Jacinta
authors.initials: J
authors.lastname: Thornton
authors.forename: Edel
authors.initials: E
authors.lastname: Duggan
authors.forename: Eilis
authors.initials: E
authors.lastname: McGovern
authors.forename: Michael J
authors.initials: MJ
authors.lastname: O'Dwyer
authors.forename: Anthony W
authors.initials: AW
authors.lastname: Ryan
authors.forename: Dermot
authors.initials: D
authors.lastname: Kelleher
authors.forename: Ross
authors.initials: R
authors.lastname: McManus
authors.forename: Thomas
authors.initials: T
authors.lastname: Ryan
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000368:Aged; D000483:Alleles; D000581:Amidohydrolases / Q000235:genetics* / Q000502:physiology; D001120:Arginine / Q000031:analogs & derivatives / Q000378:metabolism; D006348:Cardiac Surgical Procedures; D047390:Casein Kinase II / Q000235:genetics; D015331:Cohort Studies; D015897:Comorbidity; D017558:Elective Surgical Procedures; D004837:Epinephrine / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D000949:Histocompatibility Antigens Class II / Q000235:genetics; D006801:Humans; D007249:Inflammation / Q000235:genetics*; D008233:Lymphotoxin-alpha / Q000235:genetics* / Q000502:physiology; D008285:Major Histocompatibility Complex / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009638:Norepinephrine / Q000008:administration & dosage / Q000627:therapeutic use*; D020641:Polymorphism, Single Nucleotide; D011183:Postoperative Complications / Q000188:drug therapy* / Q000453:epidemiology; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics; D014655:Vascular Resistance; D014662:Vasoconstrictor Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D014664:Vasodilation
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D000949:Histocompatibility Antigens Class II; D008233:Lymphotoxin-alpha; C120111:NFKBIL1 protein, human; D014409:Tumor Necrosis Factor-alpha; D014662:Vasoconstrictor Agents; C018524:N,N-dimethylarginine; D001120:Arginine; D047390:Casein Kinase II; D000581:Amidohydrolases; C059999:dimethylargininase; D009638:Norepinephrine; D004837:Epinephrine