title: Relationship between right and left-sided filling pressures in 1000 patients with advanced heart failure.
abstract: BACKGROUND
  Elevated left ventricular filling pressures present a major target of therapy for symptomatic heart failure but are difficult to assess directly. Because the relationship of left- and right-sided pressures remains ill defined in chronic heart failure, this study compared 3 right-sided measurements (right atrial [RA] pressure, pulmonary artery systolic [PAS] pressure, and severity of tricuspid regurgitation [TR]) to the pulmonary capillary wedge (PCW) pressure.
  
  
  METHODS
  Hemodynamic measurements and echocardiography were available from 1000 patients undergoing transplant evaluation. Right atrial and PAS pressure, and TR severity were compared to PCW pressure. For 754 patients undergoing repeat measurements, changes in RA and PAS pressures were compared to PCW changes.
  
  
  RESULTS
  Right atrial pressure correlated with PCW pressure (r = 0.64), regardless of etiology or TR severity. Right atrial pressure changes correlated with PCW changes (r = 0.62). Discordance was defined as either RA > or = 10 mm Hg despite PCW < 22 mm Hg (6%) or RA < 10 mm Hg despite PCW > or = 22 mm Hg (15%). For detection of PCW > or = 22 mm Hg, positive predictive values were 88% for RA > or = 10 mm Hg, 95% for PAS > or = 60 mm Hg, and 79% for > or = moderate TR. Pulmonary artery systolic pressure correlated very closely with PCW (r = 0.79), and could be estimated as 2 x PCW. Reduction in PAS pressure during therapy was strongly determined by PCW pressure reduction (r = 0.67).
  
  
  CONCLUSIONS
  Accurate estimation of RA pressure can potentially guide therapy of left ventricular filling pressures in approximately 80% of chronic heart failure patients without obvious non-cardiac disease. In this population, elevated PAS pressures are largely determined by elevated left-sided filling pressures.
authors.affiliation: University of Texas Southwestern Medical Center, Division of Cardiology, Dallas, USA.
authors.forename: M H
authors.initials: MH
authors.lastname: Drazner
authors.forename: M A
authors.initials: MA
authors.lastname: Hamilton
authors.forename: G
authors.initials: G
authors.lastname: Fonarow
authors.forename: J
authors.initials: J
authors.lastname: Creaser
authors.forename: C
authors.initials: C
authors.lastname: Flavell
authors.forename: L W
authors.initials: LW
authors.lastname: Stevenson
mesh_terms: D004232:Diuretics / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D004452:Echocardiography; D005080:Exercise Test; D005260:Female; D006333:Heart Failure / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000628:therapy; D016027:Heart Transplantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011300:Preoperative Care; D011669:Pulmonary Wedge Pressure; D012189:Retrospective Studies; D012720:Severity of Illness Index; D014665:Vasodilator Agents / Q000627:therapeutic use; D016277:Ventricular Function, Left / Q000502:physiology*; D016278:Ventricular Function, Right / Q000502:physiology*; D017725:Ventricular Pressure
chemical_list: D004232:Diuretics; D014665:Vasodilator Agents