title: Risk factors for low cardiac output syndrome after coronary artery bypass grafting surgery.
abstract: OBJECTIVE
  Low cardiac output syndrome (LCOS) is a serious complication after cardiac surgery and is associated with significant morbidity and mortality. The aim of this study is to identify risk factors for LCOS in patients undergoing coronary artery bypass grafting (CABG) in the Division of Cardiovascular Surgery of Pronto Socorro Cardiológico de Pernambuco - PROCAPE (Recife, PE, Brazil).
  
  
  METHODS
  A historical prospective study comprising 605 consecutive patients operated between May 2007 and December 2010. We evaluated 12 preoperative and 7 intraoperative variables. We applied univariate and multivariate logistic regression analysis.
  
  
  RESULTS
  The incidence of LCOS was 14.7% (n = 89), with a lethality rate of 52.8% (n = 47). In multivariate analysis by logistic regression, four variables remained as independent risk factors: age > 60 years (OR 2.00, 95% CI 1.20 to 6.14, P = 0.009), on-pump CABG (OR 2.16, 95% CI 1.40 to 7.08, P = 0.006), emergency surgery (OR 4.71, 95% CI 1.34 to 26.55, P = 0.028), incomplete revascularization (OR 2.62, 95% CI 1.32 to 5.86, P = 0.003), and ejection fraction <50%.
  
  
  CONCLUSIONS
  This study identified the following independent risk factors for LCOS after CABG: age> 60 years of off-pump CABG, emergency surgery, incomplete CABG and ejection fraction <50%.
authors.affiliation: michel_pompeu@yahoo.com.br
authors.forename: Michel Pompeu Barros de Oliveira
authors.initials: MP
authors.lastname: Sá
authors.forename: Joana Rosa Costa
authors.initials: JR
authors.lastname: Nogueira
authors.forename: Paulo Ernando
authors.initials: PE
authors.lastname: Ferraz
authors.forename: Omar Jacobina
authors.initials: OJ
authors.lastname: Figueiredo
authors.forename: Wagner Cid Palmeira
authors.initials: WC
authors.lastname: Cavalcante
authors.forename: Thiago Cid Palmeira
authors.initials: TC
authors.lastname: Cavalcante
authors.forename: Hugo Thiago Torres da
authors.initials: HT
authors.lastname: Silva
authors.forename: Cecília Andrade
authors.initials: CA
authors.lastname: Santos
authors.forename: Renato Oliveira de Albuquerque
authors.initials: RO
authors.lastname: Lima
authors.forename: Frederico Pires
authors.initials: FP
authors.lastname: Vasconcelos
authors.forename: Ricardo de Carvalho
authors.initials: Rde C
authors.lastname: Lima
mesh_terms: D000368:Aged; D001938:Brazil / Q000453:epidemiology; D002303:Cardiac Output, Low / Q000453:epidemiology / Q000209:etiology*; D001026:Coronary Artery Bypass / Q000009:adverse effects*; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011184:Postoperative Period; D011446:Prospective Studies; D012307:Risk Factors; D013318:Stroke Volume / Q000502:physiology