Key result
Echocardiographic peak strain values generated by EchoPAC and VVI showed only moderate correlation (r=0.44-0.68) and differed significantly in most left ventricular segments.
Why the study?
Does the choice of speckle tracking software (EchoPAC vs VVI) affect the measurement of left ventricular peak strain and time to peak strain in healthy subjects?
Population
47 healthy subjects
Comparison
Echocardiographic speckle tracking strain… vs Echocardiographic speckle tracking strain…
Design
Cross-sectional
Authors
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LV strain values are not interchangeable across EchoPAC and VVI; Level 4 data leaves open vendor-specific norms before clinical use.
Cross-Sectional (n=47)
Does the choice of speckle tracking software (EchoPAC vs VVI) affect the measurement of left ventricular peak strain and time to peak strain in healthy subjects?
Effect estimate: r 0.68
p-value: p=< 0.05
Peak strain values are highly software-dependent and not directly comparable between EchoPAC and VVI, highlighting the need for caution in clinical application.
Biaggi et al. (2011) conducted a cross-sectional in Healthy (n=47). EchoPAC (2DS) vs. Velocity vector imaging (VVI) was evaluated on Pearson correlation coefficient of global longitudinal strain between 2DS and VVI (r 0.68, p=< 0.05). Echocardiographic peak strain values generated by EchoPAC and VVI showed only moderate correlation (r=0.44-0.68) and differed significantly in most left ventricular segments.
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