title: [The study on noninvasive evaluation of pulmonary artery pressure by the method of pulmonary artery flow spectrum in chronic pulmonary disease].
abstract: OBJECTIVE
  Pulmonary artery flow spectrum of patients with chronic pulmonary disease were studied in order to find excellent Doppler Indexes reflected pulmonary artery pressure, and establish multiple regression equation for estimating pulmonary artery pressure more accurately.
  
  
  METHODS
  During catheterization, 54 patients with chronic pulmonary disease were examined by echocardiography. Fourteen Doppler indexes of spectrum were compared with the pulmonary artery pressure by catheter simultaneously, and multiple regression equations were taken.
  
  
  RESULTS
  There were significant correlation between Doppler indexes PEP/AcT, AcVm, VI/(QTxVmax), RVET/QT and pulmonary artery pressure. Two multiple regression equations were deduced: PAPs (kPa) = [9.4 x PEP/AcT-1.4 x AcVm-126.1 x VI/(QT x Vmax) + 75] divided by 7.5 and PAPm (kPa) = [7.5 x PEP/AcT-1.2 x AcVm- 87.7 x VI/(QT X Vmax) + 48] divided by 7.5.
  
  
  CONCLUSIONS
  Above two regression equations could be used to noninvasively evaluate pulmonary artery pressure in patients with chronic pulmonary disease.
authors.affiliation: Department of Echocardiography, Fu Wai Heart Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing.
authors.forename: G
authors.initials: G
authors.lastname: Wang
authors.forename: H
authors.initials: H
authors.lastname: Liu
authors.forename: W
authors.initials: W
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D001794:Blood Pressure; D015150:Echocardiography, Doppler; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000503:physiopathology*; D011660:Pulmonary Heart Disease / Q000000981:diagnostic imaging / Q000503:physiopathology*; D012815:Signal Processing, Computer-Assisted