title: Effects of low-dose dopamine on ventilation in patients with chronic obstructive pulmonary disease.
abstract: BACKGROUND
  Dopamine plays an important role in the regulation of respiration and low-dose dopamine infusion is associated with a decreased respiratory drive response to hypoxia in animals and humans. The effects of dopamine on ventilation in patients with chronic obstructive pulmonary disease (COPD) is unknown. We tested the hypothesis that dopamine inhibits ventilation in patients with COPD.
  
  
  METHODS
  In a double-blinded, cross-over, placebo-controlled, randomized study we studied nine patients with decompensated COPD, ventilated in the pressure support mode in the intensive care unit (ICU) and five ambulatory patients with stable COPD. All patients received 5 micro g kg(-1) min(-1) of dopamine or an equivalent volume of 5% glucose solution.
  
  
  RESULTS
  In the mechanically ventilated COPD patients, there was no difference in the effects of dopamine compared with placebo on blood pressure, heart rate, minute ventilation (-0.5 +/- 1.1 vs. -0.2 +/- 0.9 L min(-1), P = 0.46, respectively), respiratory rate (-0.4 +/- 2.7 vs. -0.3 +/- 2.1 min(-1), P = 0.96), PaO(2) (-5 +/- 4 vs. -5 +/- 10 mmHg, P = 0.90, respectively), or PaCO(2) (-0.7 +/- 1.4 vs. -1.0 +/- 3.4 mmHg, P = 0.83, respectively). In spontaneously breathing stable patients, dopamine increased systolic blood pressure (P = 0.02) but did not influence other haemodynamic and respiratory variables.
  
  
  CONCLUSIONS
  Although low-dose dopamine has been shown to depress ventilation in a variety of conditions, it does not compromise ventilation in COPD patients either breathing spontaneously or when weaned using pressure support ventilation.
authors.affiliation: Department of Cardiology, Erasme Hospital, Brussels, Belgium.
authors.forename: A
authors.initials: A
authors.lastname: Ciarka
authors.forename: R
authors.initials: R
authors.lastname: Rimacchi
authors.forename: J-L
authors.initials: JL
authors.lastname: Vincent
authors.forename: S
authors.initials: S
authors.lastname: Velez-Roa
authors.forename: M
authors.initials: M
authors.lastname: Dumonceaux
authors.forename: M
authors.initials: M
authors.lastname: Leeman
authors.forename: P
authors.initials: P
authors.lastname: van de Borne
mesh_terms: D000368:Aged; D018592:Cross-Over Studies; D004298:Dopamine / Q000008:administration & dosage*; D004311:Double-Blind Method; D005260:Female; D005541:Forced Expiratory Volume / Q000502:physiology; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy* / Q000503:physiopathology; D014797:Vital Capacity / Q000502:physiology
chemical_list: D004298:Dopamine