title: Oscillometric estimation of aortic pulse wave velocity: comparison with intra-aortic catheter measurements.
abstract: OBJECTIVE
  Recently, a novel method to estimate aortic pulse wave velocity (aPWV) noninvasively from an oscillometric single brachial cuff waveform reading has been introduced. We investigated whether this new approach provides acceptable estimates of aPWV compared with intra-aortic catheter measurements.
  
  
  METHODS
  Estimated values of aPWV obtained from brachial cuff readings were compared with those obtained using an intra-aortic catheter in 120 patients (mean age 61.8±10.8 years) suspected for coronary artery disease undergoing cardiac catheterization. Differences between aPWV values obtained from the test device and those obtained from catheter measurements were estimated using Bland-Altman analysis.
  
  
  RESULTS
  The mean difference±SD between brachial cuff-derived values and intra-aortic values was 0.43±1.24 m/s. Comparison of aPWV measured by the two methods showed a significant linear correlation (Pearson's R=0.81, P<0.0001). The mean difference for repeated oscillometric measurements of aPWV was 0.05 m/s, with 95% confidence interval limits from -0.47 to 0.57 m/s.
  
  
  CONCLUSIONS
  aPWV can be obtained using an oscillometric device with brachial cuffs with acceptable accuracy compared with intra-aortic readings.
authors.affiliation: Department of Health and Environment, AIT Austrian Institute of Technology, Vienna, Austria.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Hametner
authors.forename: Siegfried
authors.initials: S
authors.lastname: Wassertheurer
authors.forename: Johannes
authors.initials: J
authors.lastname: Kropf
authors.forename: Christopher
authors.initials: C
authors.lastname: Mayer
authors.forename: Bernd
authors.initials: B
authors.lastname: Eber
authors.forename: Thomas
authors.initials: T
authors.lastname: Weber
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001011:Aorta / Q000503:physiopathology*; D062906:Cardiac Catheters; D003324:Coronary Artery Disease / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009991:Oscillometry / Q000295:instrumentation* / Q000379:methods*; D063177:Pulse Wave Analysis / Q000295:instrumentation* / Q000379:methods*