title: Estimation of left ventricular operating stiffness from Doppler early filling deceleration time in humans.
abstract: Shortened early transmitral deceleration times (E(DT)) have been qualitatively associated with increased filling pressure and reduced survival in patients with cardiac disease and increased left ventricular operating stiffness (K(LV)). An equation relating K(LV) quantitatively to E(DT) has previously been described in a canine model but not in humans. During several varying hemodynamic conditions, we studied 18 patients undergoing open-heart surgery. Transesophageal echocardiographic two-dimensional volumes and Doppler flows were combined with high-fidelity left atrial (LA) and left ventricular (LV) pressures to determine K(LV). From digitized Doppler recordings, E(DT) was measured and compared against changes in LV and LA diastolic volumes and pressures. E(DT) (180 +/- 39 ms) was inversely associated with LV end-diastolic pressures (r = -0.56, P = 0.004) and net atrioventricular stiffness (r = -0.55, P = 0.006) but had its strongest association with K(LV) (r = -0.81, P < 0.001). K(LV) was predicted assuming a nonrestrictive orifice (K(nonrest)) from E(DT) as K(nonrest) = (0.07/E(DT))(2) with K(LV) = 1.01 K(nonrest) - 0.02; r = 0.86, P < 0.001, DeltaK (K(nonrest) - K(LV)) = 0.02 +/- 0.06 mm Hg/ml. In adults with cardiac disease, E(DT) provides an accurate estimate of LV operating stiffness and supports its application as a practical noninvasive index in the evaluation of diastolic function.
authors.affiliation: Cardiovascular Imaging Center, Departments of Cardiology, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA. garciam@ccf.org
authors.forename: M J
authors.initials: MJ
authors.lastname: Garcia
authors.forename: M S
authors.initials: MS
authors.lastname: Firstenberg
authors.forename: N L
authors.initials: NL
authors.lastname: Greenberg
authors.forename: N
authors.initials: N
authors.lastname: Smedira
authors.forename: L
authors.initials: L
authors.lastname: Rodriguez
authors.forename: D
authors.initials: D
authors.lastname: Prior
authors.forename: J D
authors.initials: JD
authors.lastname: Thomas
mesh_terms: D000368:Aged; D003971:Diastole; D015150:Echocardiography, Doppler; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000000981:diagnostic imaging / Q000503:physiopathology; D013318:Stroke Volume; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000503:physiopathology*