Comparison of two different speckle tracking software systems: does the method matter?
Echocardiography
; 28(5): 539-47, 2011 May.
Article
em En
| MEDLINE
| ID: mdl-21517954
ABSTRACT
BACKGROUND:
Echocardiographic speckle tracking strain has gained clinical importance. However, the comparability of measurements between different software systems is not well defined.METHODS:
In 47 healthy subjects left ventricular (LV) two-dimensional (2D) peak strain and time to peak strain (TTP) generated by EchoPAC (2DS) and velocity vector imaging (VVI) were compared. For each type of strain (longitudinal [LS], circumferential [CS], and radial strain [RS]) we compared global, anatomical level and segmental values.RESULTS:
When comparing 2DS to VVI, Pearson correlation coefficients (r) of global LS, CS, and RS were 0.68, 0.44, and 0.59, respectively (all P < 0.05). Correlation of global TTP was higher 0.81(LS), 0.80 (CS), and 0.68 (RS), all P < 0.01. Segmental peak strain differed significantly between 2DS and VVI in 8/18 (LS), 17/18 (CS), and 15/18 (RS) LV segments (P < 0.05). However, segmental TTP significantly differed only in 5/18 (LS), 7/18 (CS), and 4/18 (RS) of LV segments. Similar strain gradients were found for both systems apical strain was higher than basal and midventricular strain in LS and CS, with a reversed pattern for RS (P < 0.05).CONCLUSION:
TTP strain as well as strain gradients were comparable between VVI and 2DS, but most peak strain values were not. The software-dependency of peak strain values must be considered in clinical application. Further studies comparing the diagnostic and prognostic accuracy of strain values generated by different software systems are mandatory.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Algoritmos
/
Software
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Ecocardiografia
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Interpretação de Imagem Assistida por Computador
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Função Ventricular Esquerda
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Técnicas de Imagem por Elasticidade
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Ventrículos do Coração
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article