TY - JOUR
T1 - Impact of left ventricular volume/mass ratio on diastolic function
AU - Buakhamsri, Adisai
AU - Popović, Zoran B.
AU - Lin, Jingna
AU - Lim, Pascal
AU - Greenberg, Neil L.
AU - Borowski, Allen G.
AU - Tang, W. H Wilson
AU - Klein, Allan L.
AU - Lever, Harry M.
AU - Desai, Milind Y.
AU - Thomas, James D.
PY - 2009/5
Y1 - 2009/5
N2 - Aims: To assess the impact of left ventricular (LV) volume/mass ratio on diastolic function parameters in subjects with dilated cardiomyopathy (DCM) or hypertrophic cardiomyopathy (HCM) and healthy controls.Methods and resultsWe performed echocardiography in 44 healthy controls, 35 HCM subjects, 29 DCM subjects with narrow QRS complex (DCM-n), and 27 DCM subjects with wide QRS complex (DCM-w). Mitral annulus velocity (Ea) and transmitral E-wave velocity were used to estimate time constant of isovolumic pressure decay (τ). LV flow propagation velocity (Vp) and early intraventricular pressure gradient (IVPG) were derived from colour M-mode of LV inflow. We calculated LV twist and peak untwisting rate (UntwR) by speckle tracking. Mean LV volume/mass ratio was 0.34 ± 0.09 mL/g in healthy controls, 0.15 ± 0.06 mL/g in HCM, 0.6 ± 0.2 mL/g in DCM-n, and 0.8 ± 0.3 mL/g in DCM-w patients (P <0.001 for all groups). Resting LV ejection fractions were 63 ± 7, 64 ± 8, 31 ± 8, and 26 ± 8, respectively (P <0.01 vs. controls for DCM groups). In a multivariate analysis, LV volume/mass ratio remained a strong independent predictor of Vp (P <0.001), IVPG (P = 0.009), and UntwR (P <0.001) but not for Ea (P = 0.25).ConclusionLV volume/mass ratio had influences on diastolic function parameters independent of intrinsic diastolic function and filling pressures. It should be considered when assessing patients suspected of LV diastolic dysfunction.
AB - Aims: To assess the impact of left ventricular (LV) volume/mass ratio on diastolic function parameters in subjects with dilated cardiomyopathy (DCM) or hypertrophic cardiomyopathy (HCM) and healthy controls.Methods and resultsWe performed echocardiography in 44 healthy controls, 35 HCM subjects, 29 DCM subjects with narrow QRS complex (DCM-n), and 27 DCM subjects with wide QRS complex (DCM-w). Mitral annulus velocity (Ea) and transmitral E-wave velocity were used to estimate time constant of isovolumic pressure decay (τ). LV flow propagation velocity (Vp) and early intraventricular pressure gradient (IVPG) were derived from colour M-mode of LV inflow. We calculated LV twist and peak untwisting rate (UntwR) by speckle tracking. Mean LV volume/mass ratio was 0.34 ± 0.09 mL/g in healthy controls, 0.15 ± 0.06 mL/g in HCM, 0.6 ± 0.2 mL/g in DCM-n, and 0.8 ± 0.3 mL/g in DCM-w patients (P <0.001 for all groups). Resting LV ejection fractions were 63 ± 7, 64 ± 8, 31 ± 8, and 26 ± 8, respectively (P <0.01 vs. controls for DCM groups). In a multivariate analysis, LV volume/mass ratio remained a strong independent predictor of Vp (P <0.001), IVPG (P = 0.009), and UntwR (P <0.001) but not for Ea (P = 0.25).ConclusionLV volume/mass ratio had influences on diastolic function parameters independent of intrinsic diastolic function and filling pressures. It should be considered when assessing patients suspected of LV diastolic dysfunction.
KW - Diastolic function
KW - Dilated cardiomyopathy
KW - Echocardiography
KW - Hypertrophic cardiomyopathy
KW - Left ventricular volume/mass ratio
KW - Ventricular torsion (twist)
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U2 - 10.1093/eurheartj/ehp084
DO - 10.1093/eurheartj/ehp084
M3 - Article
C2 - 19304742
AN - SCOPUS:66249098117
SN - 0195-668X
VL - 30
SP - 1213
EP - 1221
JO - European Heart Journal
JF - European Heart Journal
IS - 10
ER -