Levosimendan reduces symptoms and improves hemodynamics in patients with acutely decompensated
chronic heart failure (ADCHF). The aim of this study was to investigate (1) the association
of changes induced by low-dose dobutamine stress echocardiography in 2-dimensional
strain parameters with the corresponding changes in the left ventricular (LV) ejection
fraction (EF) and LV outflow tract velocity time integral (VTI) in patients with ADCHF
and (2) whether LV contractile reserve assessed by conventional and speckle-tracking
echocardiography is associated with clinical and neurohumoral improvement after levosimendan
treatment. Twenty-eight consecutive patients with ADCHF (mean age 65 ± 10 years, mean
New York Heart Association class 3.6 ± 0.3, mean EF 22 ± 6%) were studied using dobutamine
stress echocardiography before 24-hour infusion of levosimendan. The LV EF, VTI, and
mean longitudinal, circumferential, and radial strain and strain rate using speckle-tracking
imaging were measured. Twenty-one patients (75%) had evidence of contractile reserve
(LV EF increase >10% and VTI increase >20% after peak dobutamine dose). Patients with
versus without contractile reserve demonstrated greater improvements in New York Heart
Association class (mean change −1.0 ± 0.5 vs −0.5 ± 0.3, p = 0.01) and reductions
in B-type natriuretic peptide levels (−34 ± 30% vs +4 ± 31%, p <0.01) 48 hours after
treatment. On multivariate analysis, mean longitudinal systolic strain rate reserve
(peak longitudinal strain rate minus longitudinal strain rate at rest) was the best
predictor of improvement in New York Heart Association class (p = 0.039) and B-type
natriuretic peptide level (p = 0.042) after levosimendan among the reserve of LV fractional
shortening, the EF, VTI, and longitudinal, circumferential, and radial strain and
strain rate. In conclusion, dobutamine-induced changes in longitudinal systolic strain
rate are associated with clinical and neurohumoral improvement after levosimendan
treatment in patients with ADCHF.
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Article info
Publication history
Published online: September 09, 2008
Accepted:
June 30,
2008
Received in revised form:
June 30,
2008
Received:
May 27,
2008
Identification
Copyright
© 2008 Elsevier Inc. Published by Elsevier Inc. All rights reserved.