title: Cardiac power is the strongest hemodynamic correlate of mortality in cardiogenic shock: a report from the SHOCK trial registry.
abstract: OBJECTIVE
  We sought to analyze clinical, angiographic, and outcome correlates of hemodynamic parameters in cardiogenic shock.
  
  
  BACKGROUND
  The significance of right heart catheterization in critically ill patients is controversial, despite the prognostic importance of the derived measurements. Cardiac power is a novel hemodynamic parameter.
  
  
  METHODS
  A total of 541 patients with cardiogenic shock who were enrolled in the SHould we emergently revascularize Occluded Coronaries for cardiogenic shocK (SHOCK) trial registry were included. Cardiac power output (CPO) (W) was calculated as mean arterial pressure x cardiac output/451.
  
  
  RESULTS
  On univariate analysis, CPO, cardiac power index (CPI), cardiac output, cardiac index, stroke volume, left ventricular work, left ventricular work index, stroke work, mean arterial pressure, systolic and diastolic blood pressure (all p < 0.001), coronary perfusion pressure (p = 0.002), ejection fraction (p = 0.013), and pulmonary artery systolic pressure (p = 0.047) were associated with in-hospital mortality. In separate multivariate analyses, CPO (odds ratio per 0.20 W: 0.60 [95% confidence interval, 0.44 to 0.83], p = 0.002; n = 181) and CPI (odds ratio per 0.10 W/m(2): 0.65 [95% confidence interval, 0.48 to 0.87], p = 0.004; n = 178) remained the strongest independent hemodynamic correlates of in-hospital mortality after adjusting for age and history of hypertension. There was an inverse correlation between CPI and age (correlation coefficient: -0.334, p < 0.001). Women had a lower CPI than men (0.29 +/- 0.11 vs. 0.35 +/- 0.15 W/m(2), p = 0.005). After adjusting for age, female gender remained associated with CPI (p = 0.032).
  
  
  CONCLUSIONS
  Cardiac power is the strongest independent hemodynamic correlate of in-hospital mortality in patients with cardiogenic shock. Increasing age and female gender are independently associated with lower cardiac power.
authors.affiliation: New York Presbyterian Hospital-Weill Cornell Medical Center, New York, New York, USA.
authors.forename: Rupert
authors.initials: R
authors.lastname: Fincke
authors.forename: Judith S
authors.initials: JS
authors.lastname: Hochman
authors.forename: April M
authors.initials: AM
authors.lastname: Lowe
authors.forename: Venu
authors.initials: V
authors.lastname: Menon
authors.forename: James N
authors.initials: JN
authors.lastname: Slater
authors.forename: John G
authors.initials: JG
authors.lastname: Webb
authors.forename: Thierry H
authors.initials: TH
authors.lastname: LeJemtel
authors.forename: Gad
authors.initials: G
authors.lastname: Cotter
mesh_terms: D000368:Aged; D001794:Blood Pressure; D006328:Cardiac Catheterization; D002302:Cardiac Output; D003326:Coronary Circulation; D005260:Female; D006439:Hemodynamics; D017052:Hospital Mortality; D006801:Humans; D016015:Logistic Models; D008297:Male; D011237:Predictive Value of Tests; D011379:Prognosis; D012042:Registries; D012770:Shock, Cardiogenic / Q000209:etiology / Q000401:mortality* / Q000503:physiopathology; D013318:Stroke Volume; D015996:Survival Rate; D018487:Ventricular Dysfunction, Left / Q000150:complications; D016277:Ventricular Function, Left