title: Estimation of left ventricular filling pressures by speckle tracking echocardiography in patients with idiopathic dilated cardiomyopathy.
abstract: OBJECTIVE
  the ratio of early diastolic transmitral flow velocity (E) to early diastolic mitral annular velocity (E(a)) is frequently used to predict an increase in left ventricular filling pressure (LVFP). However, this approach has several limitations. The aim of this study was to test whether additional information is gained by new echocardiographic indexes utilizing strain and strain rate (SR) derived from 2-dimensional speckle tracking echocardiography (2D-STE) for the estimation of LVFP.
  
  
  RESULTS
  fifty-one patients with idiopathic dilated cardiomyopathy (IDC) underwent pulsed-wave tissue Doppler echocardiography and 2D-STE performed simultaneously with right heart catheterization. Receiver operating characteristic analysis showed that circumferential strain and the SR during late diastolic LV filling (0.956 and 0.951, both P = 0.001), E/circumferential SR at early diastolic LV filling (0.949, P = 0.001), and E/circumferential strain at the time of peak E-wave (0.948, P = 0.001) had greater area under the curve than the E/E(a) ratio (0.911, P = 0.001) for the prediction of pulmonary capillary wedge pressure > 12 mmHg.
  
  
  CONCLUSIONS
  when compared with the E/E(a) ratio, several 2D-STE-derived parameters better estimated the increase in LVFP in patients with IDC.
authors.affiliation: 1st Department of Internal Medicine/Cardioangiology, St. Anna Hospital, ICRC, Masaryk University, Pekarska 53, 65691 Brno, Czech Republic. jaroslav.meluzin@fnu.sa.cz
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Meluzin
authors.forename: Lenka
authors.initials: L
authors.lastname: Spinarova
authors.forename: Petr
authors.initials: P
authors.lastname: Hude
authors.forename: Jan
authors.initials: J
authors.lastname: Krejci
authors.forename: Helena
authors.initials: H
authors.lastname: Podrouzkova
authors.forename: Martin
authors.initials: M
authors.lastname: Pesl
authors.forename: Marek
authors.initials: M
authors.lastname: Orban
authors.forename: Ladislav
authors.initials: L
authors.lastname: Dusek
authors.forename: Jiri
authors.initials: J
authors.lastname: Jarkovsky
authors.forename: Josef
authors.initials: J
authors.lastname: Korinek
mesh_terms: D000328:Adult; D000368:Aged; D006328:Cardiac Catheterization; D002311:Cardiomyopathy, Dilated / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D003971:Diastole; D018619:Echocardiography, Doppler, Pulsed; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000503:physiopathology; D011446:Prospective Studies; D011669:Pulmonary Wedge Pressure; D012372:ROC Curve; D017725:Ventricular Pressure